Chosen Solution
Iphone 7 touch id not work after it drop from hand and when i try to restart then it stuck on apple logo loop
You may have caused board level damage to your device and if it was running a certain version of iOS 11 or older, we might be able to narrow it down to baseband. There’s two common issues in the iPhone 7 and 7+ but for now we’re only going to focus on one and that is baseband issues. When the frame of the phone flexes whether it’s in your pocket or in this case from a drop, it also flexes the board which can cause the baseband IC to come loose. When this issue started to pop up, it would cause boot looping because the baseband IC wasn’t communicating with the CPU and for “security reasons” wouldn’t allow the phone to boot. Now rather than issue a recall, Apple pushed a software update in one of the iOS 11 releases that basically told the CPU to ignore whether or not it was communicating with baseband and allowed it to boot up, which allowed you to create a backup and recover your data but then you were left with the “no service” message with a triangle with an exclamation point (!)” inside it because baseband wasn’t completely connected to the board. But if you were running anything newer than that iOS 11 update then this isn’t the issue.
