Contributor
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2 Messages
Unlocked my ATT Galaxy s9 plus but it still won't work on another network
I have unlocked 3 other phones (different models) prior to this one, so I'm familiar with what to do and what to expect. I bought an ATT branded Galaxy s9 plus from Samsung.com, paid in full. I requested an unlock code from ATT and was given one. I inserted a sprint sim and everything seemed to go normally and it said it was unlocked.
However, after the phone was unlocked, it would not connect to the sprint network. I had bars, but my phone popped up saying I had no data connectivity because I had left my area and was now roaming. When I looked at the sim card status on the phone, it said network: unknown, Service state: out of service, mobile network: disconnected, and other things like that. Any attempt at making a phone call just told me I was only allowed emergency phone calls. I tried manually selecting the sprint network but it wouldn't do that either
I tried a Verizon sim with the same results.
Any ideas on how to fix this? I'm leaving on a three week trip to England in two weeks and need my phone to work over there. I'm a little worried.
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GLIMMERMAN76
ACE - Expert
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23.9K Messages
6 years ago
@meralake
Its the carrier CSC file. The GSM variants for ATT and Tmobile wont work on a CDMA carrier. IF your going overseas your all set since they dont use CDMA. Verizon and Sprint are cdma carriers.
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formerlyknownas
ACE - Sage
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116.6K Messages
6 years ago
@meralake
Im in the same boat. The S8 series can switch networks, the S9 series cannot. I had to sell my ATT version and buy a Verizon phone.
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meralake
Contributor
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2 Messages
6 years ago
Thank you! You confirmed what I found just a bit ago. Makes sense and now I'm not worried.
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