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Calls getting disconnected withing few seconds

  1. rgvd1987
    Gingerbread Sep 27, 2019

    rgvd1987 , Sep 27, 2019 :
    Hi..
    I've recently bought oneplus 7pro .I am facing this problem while attempting a call from sim 1, Call is either getting disconnected within 3 -4 rings or if someone picks up call before 3-4 rings then within 2-3 seconds .
     

    #1