Does an eSIM Use Your Phone Number? Complete Guide to eSIM Numbers (2025)

Quick Answer

Yes, an eSIM comes with its own unique phone number—but it’s a NEW Indonesian number, not your home country number. 

When you activate a BaliSIM Telkomsel eSIM, you receive a distinct +62 Indonesian mobile number for receiving calls and SMS. 

Your original home number can remain active simultaneously if your phone supports dual SIM (most modern iPhones and Androids do), allowing you to manage two numbers on one device: your home number for personal contacts, and your Indonesian number for local services like Gojek, Grab, and hotel bookings.

Introduction: Understanding eSIM Phone Numbers

One of the most common questions from first-time eSIM users is: “Will my eSIM use my existing phone number, or do I get a new one?” The confusion is understandable—eSIM technology sounds futuristic and digital, leading many to assume it works differently than traditional SIM cards.

Here’s the truth: An eSIM functions exactly like a physical SIM card in terms of phone numbers. Just as inserting a physical Indonesian SIM gives you an Indonesian phone number, activating an Indonesian eSIM gives you an Indonesian phone number. The only difference is the form factor (embedded vs. physical chip)—everything else about how numbers work is identical.

This comprehensive guide explains everything about eSIM phone numbers: how they work, how to find your new Indonesian number, whether you can keep your home number simultaneously (yes!), how dual SIM functionality works, practical use cases, and how to manage multiple numbers on one device seamlessly.

How eSIM Phone Numbers Work

What is an eSIM?

eSIM = Embedded SIM

An eSIM is a digital SIM card permanently embedded in your smartphone’s hardware. Instead of inserting a physical plastic card, you activate service via QR code or activation details.

Physical components: 

- Your phone contains an eSIM chip (installed during manufacturing) 

- This chip can store multiple mobile network profiles 

- Activation happens through software, not physical swapping

Key point: The technology is different, but the functionality is identical to physical SIMs.

Does Your eSIM Get a Phone Number?

Yes, absolutely. Every eSIM comes with its own phone number when activated with a mobile carrier.

For BaliSIM Telkomsel eSIM specifically: 

- You receive a NEW Indonesian mobile number 

- Format: +62 8XX-XXXX-XXXX (example: +62 812-3456-7890) 

- This number is unique to your eSIM 

- It works for incoming/outgoing calls and SMS 

- It’s separate from your home country number

Example scenario: - Your home number: +1 555-123-4567 (USA) - Your BaliSIM eSIM number: +62 812-9876-5432 (Indonesia) - Both can be active on your phone simultaneously

What’s Included with BaliSIM eSIM Numbers?

Incoming services (FREE): 

• Receive calls from anywhere (no charge to you)

• Receive SMS/text messages from anywhere

• Receive verification codes (Gojek, Grab, banks, WhatsApp)

• Receive voice messages

Outgoing services (requires credit/pulsa): 

• Make calls (domestic and international via 01017 prefix)

• Send SMS (domestic and international)

Data services (included in package): 

• Mobile internet (based on your purchased data package)

• App usage (WhatsApp, Instagram, maps, etc.)

• Email, browsing, streaming

Important distinction: 

- BaliSIM eSIM packages focus on DATA—internet connectivity is primary purpose 

- Voice and SMS capability exists but requires adding credit (pulsa) 

- Most travelers use data for WhatsApp calls instead of traditional voice calls

Finding Your eSIM Phone Number

After activating your BaliSIM eSIM, here’s how to locate your new Indonesian number:

Method 1: Check Phone Settings (Most Reliable)

iPhone: 

1. Open Settings 

2. Tap Cellular (or Mobile Data in some regions) 

3. You’ll see both SIM options listed: 

- Your home SIM (physical card or primary eSIM) 

- Your Telkomsel eSIM (shows as secondary) 

4. Tap on the Telkomsel eSIM line 

5. Your Indonesian number displays next to “Phone Number” 

- Format: 0812 3456 7890 or +62 812 3456 7890

iPhone Pro Tip: You can label each line with custom names: 

- Rename physical SIM: “US Number” 

- Rename eSIM: “Indonesia - Bali” 

- Makes switching between lines crystal clear

Android: 

1. Open Settings 

2. Go to Network & Internet (or Connections on Samsung) 

3. Tap SIM cards or SIM card manager 

4. You’ll see both SIMs listed: 

- SIM 1: Your physical card 

- SIM 2: Telkomsel eSIM 

5. Tap Telkomsel 

6. Number displays under “Phone number” or “Mobile number”

Android Pro Tip: Most Android phones let you set icons or colors for each SIM—useful for quickly identifying which line you’re using.

Method 2: Dial USSD Code *808

This Telkomsel-specific code sends you an SMS with your number:

1. Ensure your eSIM is active for mobile data

2. Open phone dialer

3. Type: *808#

4. Press call button

5. Wait 10-30 seconds

You’ll receive SMS:

Telkomsel Info
Your number: 0812-3456-7890
Active since: [date]

Advantage: Works even if settings don’t display the number (rare iOS bug)

Method 3: Check BaliSIM Confirmation Email

When you purchase your eSIM from BaliSIM:

1. Check your email inbox (the address you provided at checkout)

2. Subject line: “BaliSIM eSIM Activation Details” or similar

3. Email contains:

• Your Indonesian phone number

• QR code for activation

• Package details (data amount, validity)

• IMEI registration confirmation

Save this email as a reference throughout your trip.

Method 4: Ask Someone to Call You

Low-tech but effective:

1. Ask hotel reception or a friend to call your eSIM

2. When your phone rings, answer it

3. Their phone will display your Indonesian number

4. Note it down or ask them to text it to you

When this helps: Some older Android devices don’t show eSIM numbers in settings—this workaround always works.

Dual SIM: Using Two Numbers on One Phone

What is Dual SIM Functionality?

Dual SIM means your phone can have two active phone numbers simultaneously: - One physical SIM card slot - One eSIM (or multiple eSIM profiles)

Real-world benefit for travelers: - Keep your home number active (for family, work, 2FA codes from home bank) - Use Indonesian number (for local calls, Gojek/Grab, hotel bookings) - No need to swap SIM cards physically

Which Phones Support Dual SIM with eSIM?

iPhone Dual SIM Support (eSIM + Physical SIM):

• iPhone XS, XS Max, XR (2018) and newer

• iPhone 11, 11 Pro, 11 Pro Max (2019)

• iPhone 12, 12 mini, 12 Pro, 12 Pro Max (2020)

• iPhone 13, 13 mini, 13 Pro, 13 Pro Max (2021)

• iPhone 14, 14 Plus, 14 Pro, 14 Pro Max (2022)

• iPhone 15, 15 Plus, 15 Pro, 15 Pro Max (2023)

• iPhone 16 series (2024)

Note: US iPhone 14 and newer have NO physical SIM slot—they’re eSIM-only (can hold 2+ eSIM profiles simultaneously)

Android Dual SIM Support:

• Samsung Galaxy S20 and newer (2020+)

• Google Pixel 3 and newer (2018+)

• OnePlus 9 and newer (2021+)

• Xiaomi Mi 11 and newer (2021+)

• Huawei P40 and newer (2020+)

• Oppo Find X3 and newer (2021+)

How to check if your phone supports it: 1. Google: “[Your phone model] dual SIM eSIM” 2. Or check Settings > SIM cards—if you see “Add eSIM” option, it’s supported

How Dual SIM Works in Practice

Scenario: You’re in Bali with iPhone 14

Your setup: 

Primary line: Your home country number (US, UK, Australia, etc.) 

- Can be physical SIM or eSIM depending on your carrier 

Secondary line: BaliSIM Telkomsel eSIM (Indonesian number)

How calls work: 

- Incoming calls to home number: Phone rings, shows “Primary” or your custom label 

- Incoming calls to Indonesian number: Phone rings, shows “Secondary” or “Indonesia” 

- You answer both types normally—phone displays which line is ringing

How to make outgoing calls: 

- When you dial a number, phone asks: “Call using Primary or Secondary?” 

- Select Indonesian eSIM for local Bali calls (cheaper) 

- Select home number for international calls (or better yet, use WhatsApp over data)

Default settings you can configure: 

- Default line for cellular data: Usually set to Telkomsel eSIM (uses your data package) 

- Default line for calls: Can set preference or choose per call 

- Default line for messages: Usually set to Telkomsel for Indonesian SMS

Practical daily use: 

- Your phone automatically uses Telkomsel data for all apps 

- WhatsApp, Instagram, email use Indonesian data (included in package) 

- Your home number stays active for emergencies (family can reach you) 

- You can make local calls using Indonesian number (cheaper rates)

Voice Calls and SMS with Your eSIM Number

Receiving Calls and SMS (Always Free)

Good news: Incoming communication is free in Indonesia.

Receive calls from anywhere 

- Indonesian numbers calling you: Free 

- International numbers calling you: Free to you (caller pays international rate) 

- No charges appear on your account

Receive SMS from anywhere 

- Local SMS: Free 

- International SMS: Free 

- Verification codes (banks, apps): Free 

- Marketing messages: Free (you can block them)

Use cases: 

- Hotel calling to confirm reservation 

- Gojek/Grab drivers calling about pickup location 

- Bank sending verification code to Indonesian number 

- WhatsApp verification SMS when setting up with your Indonesian number

Making Calls (Requires Credit/Pulsa)

BaliSIM eSIM data packages don’t include voice minutes by default—they’re optimized for mobile internet.

To make calls, you need to add pulsa (calling credit):

Step 1: Top up credit 

- Visit: BaliSIM.com Top-Up 

- Purchase credit (starts at 20,000 IDR / ~$1.30 USD) 

- Credit added to your account within 5-15 minutes

Step 2: Dial calls 

- Local Indonesian calls: Just dial 0812-XXXX-XXXX (300-500 IDR per minute / ~$0.02) 

- International calls: Use 01017 prefix for 80% savings (see International Calls Guide)

Cost examples: 

- 5-minute local call: ~2,000 IDR (~$0.13) 

- 5-minute international call (via 01017 to USA): ~5,000 IDR (~$0.32)

When you need voice calls: 

- Calling Indonesian hotels/restaurants (many don’t use WhatsApp Business actively) 

- Calling landline numbers (government offices, banks) 

- Emergency situations (calling 112) 

- Areas with poor data connection but good cellular voice

Alternative: VoIP (Recommended) 

- WhatsApp calls (free over your data package) 

- FaceTime Audio (iPhone to iPhone, free over data) 

- Google Meet / Zoom (free over data) 

- Telegram calls (free over data)

Reality: Most travelers never need to add calling credit—WhatsApp handles 95% of communication needs.

Sending SMS (Requires Credit)

Outgoing SMS costs: 

- Domestic SMS (within Indonesia): ~300 IDR per message (~$0.02) 

- International SMS: ~1,500-3,000 IDR per message (~$0.10-$0.20)

Requires pulsa/credit (same as voice calls—top up via BaliSIM.com)

Reality: Almost nobody uses SMS anymore for messaging: 

- WhatsApp is universal in Indonesia (free over data) 

- Instagram DMs (free over data) 

- Telegram (free over data)

Only use SMS for: 

- Sending info to non-smartphone users (rare) 

- Emergency situations with no data connection

Practical Use Cases for Your eSIM Number

Use Case 1: Registering Gojek and Grab

Why you need Indonesian number: 

- Both apps require +62 country code for registration 

- SMS verification code sent to Indonesian number 

- Drivers contact you via Indonesian number for pickup coordination

How your eSIM helps: 

- Provides authentic Indonesian number instantly 

- Receives SMS verification within seconds 

- Allows driver contact throughout your trip

Details: See our complete Gojek & Grab Setup Guide

Use Case 2: Hotel and Restaurant Bookings

Many Indonesian businesses prefer phone contact:

Scenario: You’re booking a villa in Ubud 

- WhatsApp Business: Slow response (they check once daily) 

- Phone call: Instant confirmation

With your Indonesian eSIM number: 

- Call directly using local rates 

- They save your number for check-in day coordination 

- Easier rebooking for future trips (they have you in system)

Added benefit: Looks like a local number—some businesses give priority to Indonesian numbers over international ones.

Use Case 3: Two-Factor Authentication (2FA)

Keeping your home number active for 2FA:

Problem: Your home bank/apps send verification codes to your home number
Solution: Dual SIM setup keeps both numbers active

Example setup: 

Home number (Physical SIM): Receives codes from: 

- Your home country bank 

- Credit card alerts 

- Email security codes 

- Social media logins

• Indonesian eSIM: Receives codes from:

- Indonesian banking apps (if you open one)

- Gojek/Grab verification

- Local hotel/tour booking confirmations

Pro tip: Don’t register important 2FA (banking, email) to your temporary Indonesian number—it expires when you leave Bali.

Use Case 4: Staying Anonymous/Private

Privacy-conscious travelers:

Give Indonesian number to: 

- Hotels (reduces spam on home number after trip) 

- Restaurants/cafes for reservations 

- Tour operators - Rental agencies 

- New acquaintances in Bali

Keep home number for: 

- Family and close friends 

- Work contacts 

- Important personal accounts

After trip: Indonesian number expires—no more spam from Bali businesses.

Use Case 5: Maintaining Separate Work/Personal Lines

Digital nomads and business travelers:

Primary home number: Work calls, important clients
Indonesian eSIM: Personal Bali activities, local services

Benefit: Can ignore Indonesian number during work hours without missing important work calls.

Managing Multiple Numbers: Settings & Tips

Setting Up Dual SIM Labels (iPhone)

Customize line names for clarity:

1. Settings > Cellular

2. Tap your physical SIM line

3. Tap Cellular Plan Label

4. Choose preset (“Business,” “Personal,” “Travel”) or create Custom Label: “Home USA”

5. Repeat for eSIM: Label it “Indonesia Bali”

Result: When a call comes in, it displays “Incoming call on Home USA” or “Incoming call on Indonesia Bali”—instant clarity.

Choosing Default Lines (iPhone)

Settings > Cellular > Default Voice Line: 

- Select “Primary” (home SIM) if you want outgoing calls to use home number by default 

- Select “Secondary” (Telkomsel eSIM) if you want local Indonesian calls to be default 

- Select “Ask Every Time” for maximum control (phone prompts per call)

Recommendation for tourists: “Ask Every Time”—lets you choose optimal number for each situation.

Settings > Cellular > Cellular Data: 

- Always select “Telkomsel eSIM” as primary data line 

- This ensures all apps use your Indonesian data package (what you paid for)

Settings > Cellular > Allow Cellular Data Switching: 

- Toggle ON if you want phone to automatically switch data to home SIM when eSIM runs out 

- Toggle OFF if you don’t want surprise data charges on home plan

Contact Management

Save contacts with correct line:

Method 1: Specify which number to call 

1. Open existing contact (e.g., “Bali Hotel”) 

2. When saving their number, tap the SIM icon 

3. Select “Indonesia Bali” (your eSIM) 

4. Future calls to this contact automatically use Indonesian number

Method 2: Save line preference 

- Contacts app remembers which line you last used to call someone 

- Call hotel using Indonesian line once—future calls default to that line

Visual Indicators

iPhone status bar shows: 

- Two signal strength indicators (one per SIM) 

- Labels (Primary, Secondary, or your custom names) 

- Which line is currently active for data (small icon)

Android status bar shows: 

- Dual signal icons 

- SIM 1 / SIM 2 indicators 

- Data indicator on active line

Common Misconceptions Addressed

Myth 1: “eSIMs Don’t Have Phone Numbers”

FALSE. eSIMs have phone numbers exactly like physical SIMs—the only difference is the activation method (digital vs. plastic card insertion).

Truth: Every eSIM activated with a carrier (Telkomsel, Verizon, AT&T, etc.) comes with a phone number for that network.

Myth 2: “eSIM Uses Your Existing Number”

FALSE (mostly). When you activate a NEW eSIM (like BaliSIM), you get a NEW number.

Exception: Some home carriers (AT&T, Verizon, Vodafone) offer “eSIM transfer” that moves your existing number from physical SIM to eSIM—but that’s a carrier-specific feature, not a travel eSIM feature.

For travel eSIMs: You always get a new local number for that country.

Myth 3: “You Can’t Have Two Numbers on One Phone”

FALSE. Most phones manufactured after 2018 support dual SIM (physical + eSIM), allowing two active numbers simultaneously.

Some newer iPhones (US iPhone 14+) support multiple eSIMs—you can have your home eSIM + travel eSIM both active.

Myth 4: “eSIM Replaces Your Home Number”

FALSE. Activating an eSIM adds a second line—it doesn’t replace or deactivate your home number.

Your home SIM continues working exactly as before (unless you manually remove it or disable it in settings).

Myth 5: “You Need to Tell Your Home Carrier About eSIM”

FALSE. Adding a foreign eSIM to your phone doesn’t affect your home carrier in any way.

They don’t know, and they don’t need to know—the Indonesian eSIM operates completely independently of your home network.

One exception: If you turn OFF your home SIM’s roaming (to avoid roaming charges), tell family/work you’ll be unreachable on that number unless you’re on WiFi (for WiFi calling).

What Happens to Your Number When eSIM Expires?

During Active Period

While your BaliSIM eSIM package is valid: 

- Your Indonesian number works fully (calls, SMS, data) 

- You can receive incoming communication free 

- You can make outgoing communication (with pulsa/credit)

After Data Expires (But Number Still Valid)

When data package expires but you’ve maintained number validity: 

- Still receive calls and SMS (free) 

- Can make calls (with credit) 

- No mobile internet (need to top up data package)

Validity maintenance: See our SIM Validity Guide for how to keep number alive.

After Number Validity Expires

When you don’t maintain number (typical for tourists leaving Bali):

0-30 days after expiry: 

- Number suspended but potentially recoverable 

- Cannot receive calls/SMS 

- Shows “not in service” to callers

30-60 days after expiry: 

- Number in grace period (hard to recover)

60+ days after expiry: 

- Number permanently deactivated 

- Released back to Telkomsel’s pool 

- May be assigned to someone else 

- Your Gojek/Grab accounts remain but need new number update if you return

If You Return to Bali Later

Option 1: Keep same number alive between trips 

- Cost: ~$3-5 USD every 30-60 days 

- Worth it if returning within 90 days 

- Maintains Gojek/Grab accounts seamlessly

Option 2: Get new eSIM with new number 

- Cost: ~$13-16 USD 

- Fresh data package included 

- Need to update Gojek/Grab with new number (5-minute process)

Cost-benefit: Maintaining number only makes sense for returns within 2-3 months.

Frequently Asked Questions (FAQs)

1. Will I lose my home phone number when I activate a BaliSIM eSIM?

No, absolutely not. Your home number remains completely active. The BaliSIM eSIM adds a SECOND line to your phone—it doesn’t replace or affect your original number in any way. You’ll have both numbers active simultaneously if your phone supports dual SIM.

2. Can I choose my Indonesian phone number?

No, phone numbers are automatically assigned by Telkomsel from their available pool. You’ll receive a random +62 8XX-XXXX-XXXX number when your eSIM activates. This is standard practice for all prepaid mobile services worldwide.

3. Can I port my home number to my eSIM?

Not for travel eSIMs. Number porting between countries isn’t possible due to different country codes (+1 USA vs +62 Indonesia). Each number is permanently tied to its country of origin.

You CAN port within same country: Some home carriers (Verizon, AT&T) let you port your existing home number from physical SIM to eSIM format—but this is separate from travel eSIMs.

4. Do I need to give everyone my new Indonesian number?

No. Most travelers keep their home number active for personal contacts and only share the Indonesian number with: 

- Local services (hotels, restaurants, tours) 

- Ride-sharing apps (Gojek, Grab) 

- Indonesian businesses

Your family and friends continue using your home number—they won’t even know you have a second line.

5. Can I use my Indonesian eSIM number for WhatsApp?

Yes, but be careful. You CAN register WhatsApp with your Indonesian number, but consider:

Pros: 

- Works perfectly for verification 

- Useful if setting up secondary WhatsApp Business account

Cons: 

- Your WhatsApp account becomes tied to temporary number 

- When number expires, you need to transfer account (complicated) 

- Contacts see you as Indonesian number

Recommendation: 

- Keep WhatsApp registered to your home number (continue using it as normal) 

- WhatsApp works over your Telkomsel eSIM data—registration number doesn’t matter for functionality 

- Use your Indonesian number only for local apps that specifically need it (Gojek, Grab)

Conclusion: Two Numbers, One Phone, Zero Hassle

Understanding that your eSIM comes with its own phone number—and that it works seamlessly alongside your home number—is key to maximizing your Bali connectivity experience. With BaliSIM’s Telkomsel eSIM, you get an authentic Indonesian number that unlocks essential local services (Gojek, Grab, hotel bookings) while your home number stays active for family and important accounts.

Key Takeaways:

• BaliSIM eSIM provides a NEW Indonesian phone number (not your home number)

• Your home number stays active (dual SIM functionality)

• Both numbers work simultaneously on supported phones (iPhone XS+, modern Androids)

• Incoming calls/SMS are free on Indonesian number

• Find your number in Settings > Cellular > Telkomsel eSIM

• Use Indonesian number for local apps (Gojek, Grab, local bookings)

• Keep home number for personal contacts and important 2FA

Your Next Steps:

1. Check if your phone supports dual SIM (likely yes if manufactured after 2018)

2. Order your BaliSIM eSIM at BaliSIM.com

3. Activate eSIM before or after arrival in Bali

4. Find your Indonesian number in phone settings or dial *808#

5. Label your SIM lines for easy identification (“Home” and “Indonesia”)

6. Register Gojek and Grab with your new Indonesian number

7. Share Indonesian number with hotels/local services only

Internal Links: 

- Get Your Telkomsel eSIM — Includes Indonesian phone number 

- Set Up Gojek & Grab — Use your new number 

- How to Make International Calls — Use your eSIM number for calls

Experience the convenience of dual numbers on one device—your BaliSIM eSIM makes staying connected in Bali effortless while keeping your home life accessible.