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I have just flashed a Europe firmware meant for H815 to H815T. In doing so I have upgraded from lollipop to marshmallow. The firmware is so smooth and fast except that there is a big problem. NO SIM signal. I know that this is because of some base band problem. Can you guys please guide me on what to do?

Thank You

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All the firmware are not Fully Stable. May be the firmware you installed doesn't have a sim support. You can simply change your custom firmware or get back your original firmware. You can have a stable Rom from Cyanogenmod. It really provides stable Rom's and mostly stable one's.

  • I doubt that it was not stable cause that's the official one. Added to this is the fact that I had tried two of them. Can you please tell me the steps to rectify this issue, as by flashing modem.bin etc? – Mehak Apr 23 '18 at 10:22
  • Going in the way of flashing modem.bin is too long. You can simply flash any version of cyanogenmod. It is best custom rom provider with least bugs and have a sim support. As if you are wondering about your current rom stability, if it was a stable one then your phone should be able to get network – Pratham Khurana Apr 23 '18 at 10:24
  • Oh I see. By the way can you please verify that if I will flash CWM then I am starting from scratch, i.e. all the issues (if any) will get fixed, even if I had flashed something rom previously, right? – Mehak Apr 23 '18 at 15:34
  • Yes but before flashing new rom, just have a hard reset. It will make your flashing more efficient. – Pratham Khurana Apr 23 '18 at 15:37
  • I surely will. One more thing is that how can I check if my bootloader is unlocked or not? – Mehak Apr 23 '18 at 16:12

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