Changing your watch's phone number involves two parts: swapping the SIM card in the watch, and updating the number in the Spacetalk App.
Part 1: Swap the SIM card
Power off the watch by holding the power button before opening it.
Replace the SIM card — follow the instructions for your watch model: Insert your SIM into your Adventurer or Insert your SIM into your Loop.
Power the watch back on and wait for the signal bars to appear, confirming it has connected to the network.
Note: If you ported your number to Spacetalk Mobile, the number has not changed, and you do not need to complete Part 2. Only continue to Part 2 if your new SIM comes with a new phone number.
Part 2: Update the phone number in the Spacetalk App
Once the watch is back online, update the phone number in the Spacetalk App so that calling, messaging, and other features keep working correctly.
Open the Spacetalk App on your phone.
Tap the Profile icon in the bottom right corner.
Select the Managed Member whose watch you have updated.
Tap the Managed Member's Watch to open Watch Settings.
Scroll down to Phone Number.
Enter the new phone number and tap Update. You will see a "Phone number updated" confirmation when complete.
Important: Update your phone contacts
Updating the number in the Spacetalk App makes the watch work correctly within the app, but it does not automatically update the watch number saved in your personal phone contacts.
Important: If you or any family member has the watch's number saved in your phone's address book, you must update it manually to the new number so you can still call the watch directly.
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If you are still experiencing issues after following the steps above, contact our Support team via live chat.