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How to repair Invalid SIM SIM card Unavailable

Infinity-Box: How to repair "Invalid SIM: SIM card unavailable"

1. Power-Off phone
2. Remove SIM card from phone
3. Insert another SIM card (with positive balance) that can be accepted by Network !
4. Power-On phone and use it

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How_to_repair_Reboot_with_sim

Infinity-Box "Chinese Miracle": How to repair "reboot/restart/freez with SIM card"

1. make full flash backup for emergency case (use 921000 speed for fast operation). It's very important step !
2. select "safe" format method
3. make "format ffs"
4. remove/install battery
5. press and hold phone "Power" button during 30-40 sec to make phone Powered-On if phone Ok go to step-6






if phone still in reboot/restart/freez state: select "complete" format method and go to step 3
if phone still in reboot/restart/freez state: try to use other SIM card, some phones works not good with some SIM cards
if phone can't Power-On: restore original flash backup
if you don't have original backup: write different firmware files with firmware version similar to original

6. restore original imei
7. if phone has touchscreen LCD make calibration: click to LCD corners one by one
if still no luck: check phone hardware (f.e. reball CPU and/or Flash chip)