B31 Smartwatch: How to Add Family Numbers
Adding family numbers to a B31 smartwatch is usually done from the companion app on your phone, not directly from the watch. The exact menu name can differ between B31 versions, so you may see options such as Family Number, SOS/Family Number, SOS Number, or Emergency Contacts.
Most B31-style GPS watches follow the same basic setup. Connect the watch to its app, open the family or SOS contact settings, enter the phone number, save it, and then wait for the watch to sync.
What Is a Family Number on a B31 Smartwatch?
A family number is usually a trusted contact such as a parent, guardian, or another family member. These numbers can be used by the watch for emergency calls and may also appear in the normal contact list depending on the watch software.
Family numbers and regular Phone Book contacts are not always the same thing. The Phone Book is normally used for everyday calls, while SOS or Family Numbers are more closely linked to the watch’s emergency calling feature.
Some B31 versions may combine these features, so do not worry if your app uses slightly different names.
Before Adding Family Numbers
Before changing the family contact settings, make sure the watch is already connected to its companion app. If the app cannot communicate with the watch, the number may save on your phone but never reach the smartwatch.
Check these things first:
- The B31 smartwatch is powered on
- The correct watch is connected to the app
- The SIM is active if your B31 uses one
- The watch has a mobile or data signal
- Your phone has an internet connection
- The app account has permission to manage the watch
If the watch appears offline inside the app, fix that problem first. Family contact settings usually need the watch to be online so they can sync.
How to Add Family Numbers to a B31 Smartwatch
The exact buttons may look a little different depending on the B31 model and companion app, but the process is usually similar.
Follow these steps:
- Open the companion app used with your B31 smartwatch.
- Select the correct watch if you have more than one device connected to the account.
- Open More, Settings, or Device Settings.
- Look for Family Number, SOS/Family Number, SOS Number, or Emergency Contacts.
- Select an empty family or SOS contact slot.
- Enter the person’s name if the app asks for one.
- Enter their phone number carefully.
- Tap Save, Confirm, or the similar option shown in your app.
- Keep the watch online for a short time so the new setting can sync.
- Check the watch’s contact list or test the SOS function to make sure the number was added correctly.
If the contact does not appear immediately, wait a moment and reopen the contact list. Restarting the watch can also help refresh the synced data.
What Phone Number Format Should You Use?
Use a simple phone number format when adding family contacts. Some smartwatch apps can have trouble with spaces, brackets, dashes, or other symbols.
For example, instead of entering something like:
+1 (555) 123-4567
try a cleaner format such as:
+15551234567
The exact format that works best can depend on your country and mobile carrier. In some cases, a normal local number works fine, while another watch may work better with the full international country code.
If the number saves but calls fail, try removing spaces and special characters first. Then test the number again.
How Many Family Numbers Can You Add?
There is no single limit that applies to every device sold as a B31 smartwatch. Some GPS watch systems provide around three SOS contact slots, while others allow a larger family contact list.
The easiest way to check your model is to open the Family Number or SOS section in the companion app. If you see three numbered fields, your watch is probably designed around three main emergency contacts.
If your app shows a normal scrolling list with an Add button, it may support more contacts. Use the number of slots shown by your own app rather than following a limit from a different B31 model.
How to Add Normal Contacts to the B31 Phone Book
If you only want someone to appear as a normal contact, look for a separate Phone Book or Contacts section in the companion app.
The usual process is:
- Open the B31 companion app.
- Go to More or Device Settings.
- Select Phone Book or Contacts.
- Choose Add Contact.
- Enter the person’s name and phone number.
- Save the contact.
- Wait for the watch to sync.
After syncing, the new contact should appear in the watch’s phone book if that feature is supported by your model.
Remember that a normal Phone Book contact may not automatically become an SOS contact. If you want someone to receive emergency calls too, add them to the Family Number or SOS section as well.
How to Test Family Numbers After Adding Them
Do not assume the setup is finished just because the app says the number was saved. Test it once so you know the watch can actually call that person.
First, check whether the number appears in the watch’s contacts. If your model allows normal outgoing calls, try calling the family member directly from the watch.
Then test the SOS feature when everyone knows you are testing it. Many GPS watches start an emergency call when the SOS or power button is held for a few seconds.
Some watches call the saved SOS numbers one after another if the first person does not answer. The exact button and calling order can vary by B31 model, so watch what happens during your test.
Make sure your family knows it is only a test so nobody mistakes the call for a real emergency.
Why Is the Family Number Not Showing on My B31 Smartwatch?
If the number saves in the app but never appears on the watch, the problem is usually with synchronization or connectivity.
Check the following:
- Make sure you tapped Save after entering the number
- Confirm the watch shows as online in the app
- Check the SIM and mobile data connection
- Make sure the watch has a network signal
- Confirm you are editing the correct connected watch
- Remove spaces or unusual characters from the phone number
- Restart the smartwatch
- Close and reopen the companion app
- Delete the number and add it again
The watch normally receives these settings through its network connection. If it is offline, the app may keep the change temporarily but the watch itself will not receive it.
Give the watch a minute after saving before assuming the sync has failed.
Why Can’t the B31 Call a Saved Family Number?
A contact can appear correctly and still fail when you try to call it. That usually means the contact setup itself worked, but there is another problem with calling.
Possible causes include:
- The SIM does not include voice calling
- The SIM has no balance or active calling package
- Mobile signal is too weak
- The phone number format is wrong
- The contact has not fully synced
- Calling restrictions are enabled
- The number was added to Phone Book instead of the required Family Number slot
- The watch is using a network that does not support its calling feature properly
Try calling another saved number as a test. If no numbers work, focus on the SIM, network, and watch calling setup rather than editing each contact again.
If only one number fails, recheck that specific number.
How to Edit or Delete a Family Number
You can usually edit a family number from the same menu where you added it.
Open the companion app and go back to Family Number, SOS/Family Number, or the similar setting used by your watch. Select the existing contact and replace the name or number, then tap Save.
To remove a number, use the Delete or Remove option if the app provides one. Some apps simply let you clear the field and save it again.
Keep the watch online after making the change. The edited contact still needs to sync before the new number appears on the smartwatch.
What If You Cannot Find Family Number in the App?
This is one of the biggest points of confusion with B31 smartwatches because the B31 name is used on different types of devices.
Start by checking these menus:
- Family Number
- SOS/Family Number
- SOS Number
- Emergency Contacts
- Phone Book
- Contacts
- Device Settings
- More
If none of these options appear, check what kind of B31 watch you actually have. Some B31 devices are GPS or kids watches controlled mainly through a parent companion app. Others are full Android smartwatches that work more like a small phone.
On a full Android B31 smartwatch, you may not have a special Family Number menu at all. In that case, contacts may be added through the normal Contacts app, Google account sync, SIM contacts, or Bluetooth depending on the watch.
This is why two people with a watch called B31 can see completely different menus.
How to Prevent Family Number Problems
Once the numbers are working, there is not much maintenance required. Still, it is worth checking emergency contacts from time to time because phone numbers and SIM settings can change.
A few simple habits help:
- Keep family phone numbers current
- Remove old or unused emergency contacts
- Use simple number formatting
- Keep the watch SIM active
- Make sure the watch stays connected to the correct app account
- Recheck contacts after firmware or app updates
- Test SOS occasionally when family members know it is only a test
- Make sure the primary emergency number belongs to someone who can usually answer
This matters more for SOS contacts than normal Phone Book entries. An old emergency number can make the feature much less useful when it is actually needed.
Final Thoughts
To add family numbers to a B31 smartwatch, open its companion app, go to More or Settings, and look for Family Number, SOS/Family Number, or SOS Number. Enter the contact, save it, keep the watch online, and then test the number after it syncs.
If you cannot find any Family Number menu, first check which type of B31 smartwatch you own. A GPS kids watch usually manages these contacts from its companion app, while a full Android B31 watch may use a normal Contacts app instead.
If yours is not working, the most useful detail is this: can you see the Family Number menu but the contact will not sync, or is the Family Number option completely missing from your app?
