I have several issues with my Fairphone 2:
A) bad signal (1 – 2 times a day)
B) Display some times only working if I bend the phone case (1 time a day, but recently more often)
C) cannot turn off phone, it always reboots (always)
D) Unexpected Reboots (~ 2 times a day)
Here are more details on each issue:
A) I am experiencing this since minimum 1 year (probably even longer). It only happens from time to time so it’s hard to nail it down. If it happens my phone indicates that I have signal but e.g. loading a webpage won’t work because I have no Mobil connection. Or I try to make a call, the phone dials but then after some seconds I get the message “no signal”. It also happens quite often that some one tries to call me but I’m not available. When the problem occurs I can usually feel that the phone heats up quickly in the top area and the battery is loosing power very quickly. There are 2 ways to fix: either just wait some minutes until the phone “recognizes” and starts to register to the network again. Or I enter flight mode for min 10 seconds then disable flight mode again. I already changed the Carrier and also reset my phone completely. I also tried different versions of FP OS as well as linage OS. None helped so far. I also checked connection of antenna cable, cleaned contact pins, disassembled and put together all modules. No success.
B) I see this issue since approximatly since one month now. The last 2 days it increased, so that it is hardly possible to use my phone. The problem is that the phone is acutally working fine but when I try to unlock it the display just stays dark when I press the standby button. If I bend the phone (not sure where or how excatly I have to bend) the display comes up. Some times it keeps on working fine – some times I have to bend it continuesly in order to make the display show something. If the display is once on and I relief the bend, the display either just freezes or shows stripes, greys out the screen. I first thought that the display module is broken again but I switched to a completly new display module and I can see exact same behavior. I have the feeling that it is somehow related to temperature. I‘m not sure but it feels like its working better when the phone is colder.
C) This happens since I switched to the new camera module. I‘m running Lineage OS. I just found this post while typing these lines and it seems that it really fixes my issue Now I can finally encrypt my phone!
D) The phone just reboots. I think it happens like > 2 times a day but very often I do not even realize it because when I put it out of my pocket it is just as before. But I usualy realize it min. once a day.
Conclusion: I suspect that the core module is broken as the cause for A) and B) maybe also for D). Hence I would like to get a new core module. As far as I understood I have to write to the support team for that. But it also seems that the core module then costs arround 300€ which is too much for me. For 300€ I can even get a refurbished FP2 or any other phone.
Does anyone of you have different suggestions on what I can do? Or what the reason for one of the issues might be? Or maybe suggestions on how to fix one of the issues?