I bought a used OnePlus 2, and it seems to be the Chinese version. I'm in Europe.
It's in perfect condition, no scratches or water damage but was sold as faulty as it could not recognise any sim card. The previous owner claims this happened when he updated from one version of Oxygen OS to another stable version of Oxygen OS.
I updated to Oxygen OS 3.0 beta and after some research I went to fastboot mode and erased modemst1, modemst2 and persist. I rebooted and now it found the sim card but the sensors went crazy. I then flashed a new persist.img and the sensors are back to normal.
However half the time there is no network signal and when I get a signal it is very weak. On the few times it connects to mobile internet I can only get 2G. When the icon shows 3G, H, H+, or LTE the internet connection doesn't work at all.
I flashed both stable and beta versions of Oxygen OS but the problem remains. I also played about with the *#*#4636#*#* mode and no band mode worked any better.
Is it a software issue, and if it is how do I fix it?
Or is it a hardware issue and I need a new motherboard? From where do I buy a motherboard? I didn't find one on AliExpress or Ebay.
Thanks!!
It's in perfect condition, no scratches or water damage but was sold as faulty as it could not recognise any sim card. The previous owner claims this happened when he updated from one version of Oxygen OS to another stable version of Oxygen OS.
I updated to Oxygen OS 3.0 beta and after some research I went to fastboot mode and erased modemst1, modemst2 and persist. I rebooted and now it found the sim card but the sensors went crazy. I then flashed a new persist.img and the sensors are back to normal.
However half the time there is no network signal and when I get a signal it is very weak. On the few times it connects to mobile internet I can only get 2G. When the icon shows 3G, H, H+, or LTE the internet connection doesn't work at all.
I flashed both stable and beta versions of Oxygen OS but the problem remains. I also played about with the *#*#4636#*#* mode and no band mode worked any better.
Is it a software issue, and if it is how do I fix it?
Or is it a hardware issue and I need a new motherboard? From where do I buy a motherboard? I didn't find one on AliExpress or Ebay.
Thanks!!
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