I have a note 2 that is rooted and with custom rom. I wanted to sell it and revert it back to fully stock. With stock recovery. What I did was to download a stock rom from samsung updates. And flash it via odin. Everything went fine expect I lost phone signal. Even though I had a sim card inserted. I tried rooting it back and flashing my old custom rom. And there was signal again. What could be the problem in my case? Called samsung service center and they said that there is a chance that I lost my imei number. How can u encode the imei anf find the right imei for my phone?
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