Answer to "Ear speaker low sound when making calls"Hello if anyone else is still having this problem and it started around the time iOS 12 was released or you purchased the phone sometime after one of the updates added a feature for iOS devices that support surround features for the audio if you go into your settings>general>accessibility and scroll down to the audio section you’ll see an option that says mono if this is turned off this could be your problem. Just turn mono on and it’s a night and day difference. In the past I’ve tried cleaning the earpiece and nothing worked so I started looking at the settings and noticed I now don’t have a scroll bar for call volume and a few new options were there that weren’t before like the option for Bluetooth hearing aids. My issue with mine didn’t start till after an iOS update and so I looked for any settings that could be causing it. Naturally I’ve already tried cleaning the mesh over the earpiece and had already considered replacing the earpiece speaker all together but I didn’t think that’s where the issue was...
Answer to "iPhone glitches when twisting"Please do not force any twisting or bending motion to the phone the reason your noticing the glitchy issue is that by twisting and bending the device you may be putting stress on the ribbon cables or the backlight on the screen that glitch is essentially a controlled short being created between the backlight and the digitizer
Answer to "Black screen ipad air"That sounds like a prox sensor issue I wasn't aware of there being one in the any of the iPad's but I would start there if it does have one other than that I'd have to do more research on it to see what else could be causeing that let me know how it goes