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herbert7265

macrumors regular
Original poster
Jun 2, 2023
134
92
Mexico
All

Maybe, maybe not somebody can help me with a weird problem I face with my Apple Watch 10 regarding its cellular functionality.

First of all, I am using
- an Apple Watch 10, GPS+Cellular, watchOS Version 26.1 with
- an Apple iPhone 16 Pro, iOS Version 26.1

Problem description:

- I was using my AW 10, together with the iPhone 16 Pro, since around October 2024, without any problems. Before I used an older AW, with an older iPhone, also without any problems. All my Apple Watches have (had) the cellular functionality and I have contracted the service via my cellphone carrier Telcel (I am living in Mexico).
- My wife also is using an AW 10, with GPS +Cellular, but with an iPhone 14 Pro Max.
- A few weeks ago I observed the first time that my AW showed in the Cellular function / screen the status "No Connection", despite showing my cellular plan. Checking the plans for my cellphone and my AW everything was active and normal.
- When I first observed the problem my iPhone and my AW had still not been updated to iOS / watch OS 26.
- Interestingly, when I detected the problem on my AW I also detected the same problem on the AW of my wife!

To make a long story short, after I detected the problem the first time I was several times in contact with the technical support of my cellphone and watch service carrier, but with no real success. My first assumption was that this is a problem of the carrier, considering it appeared on different devices, different OS and so on. But what ever they did, it solved the problem for a few days, then the same problem appeared again with my AW, but also with the one of my wife.

Today now I made an interesting observation:

Since three days the same problem again, means neither my AW, nor the AW of my wife, connected to the cellular service, after it worked for approx. 2 weeks (after my last contact with the support of the carrier).
Being a little annoyed, I simply tried different things today with my AW to see if I may find at least a hint what is going on, without again spending time with the support of the carrier. And here we go...!

When I
- turn off Bluetooth on my iPhone
- then restart my iPhone (with BT turned off!) and my AW (not changing the BT setting on my AW!)
- the my AW connects to the cellular service after the restart and everything works!

But
- as soon as I turn on Bluetooth on my iPhone again
- the cellular service on my AW stops working again, shows again "No Connection"
- does not connect again, even I turn off BT again on my iPhone, go into "Airplane" mode on each of the devices, etc.
- and only works again when I again turn off BT on my iPhone and restart both devices.

Has anybody any idea what could cause this weird behavior and, hopefully, how it could be solved?

No, I have not decoupled and re-installed my AW from my iPhone today, but I did that when the problem appeared the first time, with no success (but I can do it again, no problem).

No, I could not check the AW of my wife at this moment, as I am at work, but I will do so in the evening. And I am quite confident it will show the same behavior.

Herbert
 
The watch prioritizes the radios:

1) Bluetooth connection to phone - least expensive on power.
2) Wifi connection - second least expensive on power.
3) Cellular - will activate if there is no BT nor Wifi to connect to.

So yes, while BT has an active connection, or while Wifi has an active connection, the cellular should not be in use.

You need to ensure that there is no BT and no Wifi available to the Watch, and then give it a few minutes to connect to the Cellular network.
 
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