Q: Iphone 7 4g signal loss

I Have same problem with iPhone 7 on 3.  Went as far as swapping the iPhone for another iPhone 7.  Same issue.  3 have now confirmed to me that its an issue with the 3 network.

I Have a iphone 7 plus 128gb and my phone is on three.  I have the same issue, 4g drops to 3g.  By resetting the phone, it brings 4 g back, but not for long!

I Hope this is sorted soon!

Discovered that if you turn off Automatic Network Selection and instead manualy select 3 I get a 4G signal.  Hope it lasts more than a couple of hours.

A tentatively hopeful reply: not for the faint-hearted, but I installed the public beta of iOS 10.1, with carrier software version 25.5. This appears to have resolved the issue.

The official version will probably be out in a couple of weeks; hopefully that should sort us out. Things crossed.

Rob