[Update: This issue appears to have been fixed in iOS 10.1 Beta 2 as carrier settings have been updated to Three 26.0. My iPhone 7 Plus now appears to be defaulting back to 4G when it should, as was expected and experienced on the 6S Plus - however some people still reporting issues even after this update] Ok, So I had all the past iPhones and ever since I was able to get 4G, my phone would always pick it up at least while I was at home, anywhere in the house or while at work, wherever I was in the building. My last phone was a 6S Plus which I had since launch and likewise, no issues whatsoever. My new iPhone 7 Plus however, I have only for the briestfest of moments seen it on 4G. The rest of the time, it is solidly stuck on 3G. Things I have tried: Go to settings and then "about" and waited a good 5 minutes and I can confirm I have the latest carrier settings. I have reset network settings, phone has rebooted and still on 3G. I have confirmed 4G is enabled in the settings under carrier for voice and data. I have also switched it to just data and waited - still only 3G. I have restored the phone and re-loaded my backup - still on 3G. I have restored the phone and set it up as blank/new phone - still on 3G. I have this morning gone to the carrier and swapped out a sim for another - still on 3G. *Now none of these worked* Anyone else with a 7/Plus having issues? My network here in the U.K. is "3". Either something weird is happening with the new phones or I guess my phone needs changing, which is weird because if its connecting to data and also to 3G - why wouldn't 4G work Any ideas?