I've been seeing this issue of blue dots, visible only on a white screen, on a few iPhone 12/12 Pro OLEDs now, and I'm...

I've been finding this issue frequently with iPhone 12s where one/multiple buttons (power/vol up/vol down) stick or are...

The loudspeaker connects to the rest of the phone via the chargeport flex. Since you determined the fault is not with the loudspeaker, it's more than likely the chargeport flex which is at fault.

Just to clarify - with the new housing and screen the only issues remaining are the touch and intermittent lag? And that only the housing and screen were replaced, are you using the original charging port or did you end up swapping it? My first instinct is towards the screen, given the touch issues and that you described it as a "cheap aliexpress screen". Can you provide any info on the details of the screen you bought - they may describe it as LCD, hard OLED, soft OLED, or some variation of that. If it was the cheapest, I'm concerned it might be LCD? LCD is the worst for an OLED phone, it can often have touch issues, and since the phone was designed for the lower power OLED type display, the backlight drains far more power than the phone was designed for.

The display is the same. Did you purchase only the logic board alone? The TouchID functionality of the home button is paired to the motherboard, so if you change the board without also swapping the home button, you will get the error about being unable to activate TouchID. If you do have the original home button corresponding with the new board and have installed it into your screen, then either the home button flex was damaged somehow or the display flex was. If the former, that would require microsoldering to fix, and if the latter you would just need a new display. Onto the rebooting issue. Is the rebooting random, or does it reboot after a consistent length of time? Please go into display & brightness settings and turn off auto-lock, and leave the phone screen on, unlocked for a few minutes. If it reboots after around 3 minutes, please check the panic logs for more information. These can be found under Privacy -> Analytics & Improvements -> Analytics Data. If you see any file in there called " please s...

I have found that bootlooping issues that occur only when plugged in may be caused by a battery issue (disconnected or connection issue). Has the battery ever been replaced before? For example, I had a phone (iPhone Xs) with a previous battery replacement brought to me for a similar complaint after the customer had dropped it. When plugged in, the phone would either display the charging symbol, or would bootloop. In this case, a battery replacement solved this issue.

Yes, dual and single SIM A70s have the same screen. For most recent North American Samsungs, excepting the Verizon S20, the screens for the North American and international models are the same.

To replace the iPhone frame you would have to replace the entire housing (frame + back glass together as a single part). The issue with your device is that because it is still pretty new at this time you may run into issues sourcing quality parts.

On iPhones released after the iPhone X there is a sensor on the charging port flex that communicates with the CPU. If this sensor is damaged or missing (as it may be on poor quality 3rd party parts), the device will reboot itself every 2 minutes and 50 seconds if the screen is on (it won't reboot while locked). Since you replaced the lightning port here I suspect this is the issue. To verify this issue you can check the panic logs (search "Analytics" in settings, look for a file called "panic-full-xxx.ips" under Analytics Data). See this question for more information (different model, but same issue). The good news is that your phone is not toast and you haven't done anything irrepairable, the bad news is that you will probably need to replace your charging port again. As for the other issues you mentioned: the phone will function perfectly fine if you forgot one of the screws for the bracket. It's best to put everything that was in the phone back the way it was but one missing bracket screw is not the end...

There is actually one iFixit guide for S20 FE that I found for display assembly replacement. It seems to be located in the wrong place and not under the regular S20 FE device page, so it is difficult to find. Not sure if it's possible to move this guide so that more people would be able to find it. Hope this helps.

Depends upon the starting condition of the screen. If the scratches are too deep (as a guideline, if it can be caught by dragging your fingernail across the screen), polishing may lessen, but will not eliminate them. But for light scratches it can definitely help to improve the cosmetic appearance of glass surfaces. Note that on 12/13 series (and I assume future iPhones), they have a Ceramic Shield coating on the screen that polishing will remove.

iPhone 5 screws are 3.6mm and 5s/SE2016 are 3.9mm, according to iFixit. However, iFixit sold the same replacement pentalobes for 5/5s/SE, suggesting that they can still use the same screws, despite them being different lengths. 5c screws are different from the rest. 5/5s/SE screws are built with 3 sections - head, shaft without threads, shaft with threads at the bottom. 5c screws have a very thick head followed by a fully threaded shaft. 6/6+ screws are the same, but different from 6s/6s+ and 7/7+. The difference between 6/6+ and 6s/6s+ is in length. The iFixit guide for 6+ states the screws are 3.6mm in length. According to the measurements supplied by a third party vendor, 6/6+ screws differ from the iPhone 5 screws of the same length by having a thinner head (0.416mm vs 0.424mm). Guides for 6s+ and 7+ state the lengths to be 3.4mm and they have the same number of threads and threads in the same position so I believe these are the same. However, I have seen these screws sold as different items on vendor...