I tried chainfire's region lock away and it still does not work. It does not say anything regarding invalid sim. The only warning i could see is "not registered on mobile networks". Is there any way i could update the baseband or modem? Coz I read somewhere that when you update these changes.
In the s4 section there is a thread how to flash different 4.3 baseband you cant downgrade but you can try other 4.3 baseband. Its risky you might brick your phone. From mj9 try mk1
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