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Add my voice to this - also not able to maintain a 4G connection on Three network where it was fine on my 6s. A restart resolves the issue but only temporarily.

My iPhone 7 model number is listed in General>About as MN922B/A. I don't know if this translates into one of the numbers you've listed above.
Look on your box mate
 
Mine is a iPhone 7 32GB on the back of it is A1778

It was stuck to 3G when I got up this morning had to change carrier from auto to manual and back to auto to get 4G back.
 
Strangely my iPhone started connecting to 4g from home, but I think it's connecting to 800mhz 4g (which I think is what is working well) I've not been able to check out what happens in a strong faster 4g area like Birmingham city centre because I've been stuck at home the last couple of days.
 
Add me to the list, iPhone 7+ 128GB (A1784).

Hoping it's an issue with 3 that can be solved easily and not a device issue. Everything I've tried appears to be temporary and 3 have been pretty much quiet since I contacted them on Monday. :(
 
Mine is a 7+ A1748

Still not connecting to 4G properly...
[doublepost=1474463659][/doublepost]Just also spoken to Apple Support who have escalated this matter for me and also to Three who again have escalated this too.

The more people that contact them, the better/quicker a fix will be :)
[doublepost=1474463706][/doublepost]
Add me to the list, iPhone 7+ 128GB (A1784).

Hoping it's an issue with 3 that can be solved easily and not a device issue. Everything I've tried appears to be temporary and 3 have been pretty much quiet since I contacted them on Monday. :(


Same, its not that it wont connect to 4G, it just wont stay on 4G until you have to reset and reboot....
 
Mine has got some 4G today and when I do its pretty good.
 

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Rebooted (simple power button off/on) again this morning, 4g is still ok for now about 4-5 hours later.
 
Just spoke with Three who've advised to turn Enable 4G off until Friday so they can apparently run some connectivity tests.

I've got no idea how this is going to benefit me but it seems like this is going to be a long and drawn out process until they find a fix.
 
Just spoke with Three who've advised to turn Enable 4G off until Friday so they can apparently run some connectivity tests.

I've got no idea how this is going to benefit me but it seems like this is going to be a long and drawn out process until they find a fix.
Maybe thats when their jet black ones arrive for testing ;)
 
Just spoke with Three who've advised to turn Enable 4G off until Friday so they can apparently run some connectivity tests.

I've got no idea how this is going to benefit me but it seems like this is going to be a long and drawn out process until they find a fix.
Is this a 3 carrier specific menu item because I do not see anywhere to turn off Enable 4G on my phone.
It's unlocked with a 3 SIM Card.
 
Weirdly my 4G is working without a problem. I'm getting 4G signal from the same areas I use to get on my 6. Didn't work this morning
 
I called Three just now and gave them my work postcode where I always get 4G but haven't been since I upgraded (SE1) and was told they're doing upgrade work which should be completed by Tuesday 27th...?
 
Yeah, I guess once more people start getting their phones and complaining, nothing will be done yet ....
 
I called Three just now and gave them my work postcode where I always get 4G but haven't been since I upgraded (SE1) and was told they're doing upgrade work which should be completed by Tuesday 27th...?
This is BS as many of us are having problems but others next to us on an iPhone 6 are fine
 
Carrier Update in iOS 10.1, it's been updated to 25.5 (up from 25.1), will report back my results after I've used it for a while
 
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