No signal


    Hello...I have a T-mobile branded Samsung galaxy s8+ phone sent to me...I stay in Nigeria...I used it for about 3 months with the carrier network here in Nigeria but all of a sudden, it stopped working...the IMEI couldn't read networks anymore even after I did an upgrade to the latest version that showed on my phone...I only use Wi-Fi on my phone presently...please how can you assist me on this...IMEI:357759080037492  IMEISV:23 

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