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samsung galaxy s21 5G network issue

(Topic created: 03-20-2026 09:03 AM)
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mangan
Constellation
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Galaxy S21
 
 

Hello everyone .i have a question .my phone model is samsung s 21 5g . recently i faced green line issue. i change the display in local insell TFT display with frame .after changing the display and frame i got some network problem . i try all the method like changing the sim brand which is get fastest network but i cannot get proper network. i go to the repairing shop but the mobile technician he didn't get any folt like flex problem or connector problem . if any idea in your mind whats the cause of this problem . frame or etc. if you have time plese reply my messsage 

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Samsung_Moderator
Community Manager
Community Manager
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Galaxy S21

Hello mangan, welcome to the Samsung Community! I understand your concerns with your device not being able to connect to your carrier network after getting your display serviced. You stated that you changed your SIM card but you still are unable to get the proper network. Take a look at this link for some additional troubleshooting: SIM card issues on your Galaxy phone or tablet. If you are still having issues I recommend that you reach out to your Carrier for additional assistance. 




Be sure to click " โœ“ Accept as Solution" when you find an answer that works for you.


Please note, notification emails are a DO NOT REPLY address, you must log-in on the community page in order to respond.

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Samsung_Moderator
Community Manager
Community Manager
Options
Galaxy S21

Hello mangan, welcome to the Samsung Community! I understand your concerns with your device not being able to connect to your carrier network after getting your display serviced. You stated that you changed your SIM card but you still are unable to get the proper network. Take a look at this link for some additional troubleshooting: SIM card issues on your Galaxy phone or tablet. If you are still having issues I recommend that you reach out to your Carrier for additional assistance. 




Be sure to click " โœ“ Accept as Solution" when you find an answer that works for you.


Please note, notification emails are a DO NOT REPLY address, you must log-in on the community page in order to respond.