Galaxy S8 Can't Make Calls - Sim Error SOLVED

MaxKittens

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Aug 4, 2015
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I have a verizon galaxy s8 that I am using with an AT&T sim. Everything works on the device, even data, sms and mms. But when I try to make a call it says "No SIM, or SIM error." I don't know how.

UPDATE: I solved the issue by changing the band from CDMA to GSM. Now everything works!
 
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anon(238680)

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Mar 22, 2011
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Re: Galaxy S8 Can't Make Calls - Sim Error

Funny that you're getting that error and can still use text. Go to Settings, Apps, and find your phone app. Do a force stop, clear cache and clear data. Reboot and see if that helps. If not, then contact AT&T and discuss new SIM with them.