Lenovo IdeaTab A2107A-H Unlock by Sigma..[Reference]
Unlocking Procedure:
1. Open Sigmakey Software
2. Select MTK Platform
3. Select Unlock tab
4. Connect Powered OFF Lenovo Ideatab to USB
5. Install USB Drivers - MTK Drivers
6. Select "Gadget Serial (COMxx) *MediaTek Inc." in Serial Port
7. Hit Direct Unlock and wait till its Done.
Signal is Okey now After Unlock
Unlocking Procedure:
1. Open Sigmakey Software
2. Select MTK Platform
3. Select Unlock tab
4. Connect Powered OFF Lenovo Ideatab to USB
5. Install USB Drivers - MTK Drivers
6. Select "Gadget Serial (COMxx) *MediaTek Inc." in Serial Port
7. Hit Direct Unlock and wait till its Done.
Signal is Okey now After Unlock