Chosen Solution
Hey, i got some problems with an 6S, iOS version 11.2,11.2.2,11.2.5,11.3 beta 1 the phone was bought 2 years before in germany. used with Telekom/T-Mobile in Germany Telekom uses 2G on 900 Mhz, 3G on 2100 Mhz, 4G on 800,900,1800 and 2100 Mhz. the phone can only connect to 4g and only to band 20/800 Mhz, no other cellular connection is possible. bluetooth works, wifi works 2,4 ghz/5Ghz. i restored the phone with itunes in dfu and recovery… i used other simcards… the issue started 1 week ago. the hast a light crack in the front glas, but this happend earlier, the phone bends right under the volume down button. maybe you can help
the phone bends right under the volume down button. This leads me to believe there may be a crack in the antenna part of the housing. As you can see there are about 4 spots on the housing where the antenna is part of the housing, top left and right, bottom left and right marked as a brighter color than the housing white or grey for example. Replacing the housing may be worth a try if you can find good quality housing with pre assembled parts. Here is a guide if you are willing to go ahead and DIY it, it’s very time consuming: iPhone 6s Rear Case Replacement
