Post originale di: Ricardo Sarabia ,
This might be a problem with the SIM card itself. In order to fix this problem, the SIM card will have to be replaced. If replacing the SIM card is still not working, then it is most likely the problem is within the motherboard. In this case, the motherboard will have to be replaced. Visit the [[BLU Studio 5.0 II Troubleshooting|troubleshooting]] page for additional information and links to respective replacement guides.