If you lot abide by whatever software malfunctions amongst your Karbonn A21 android device, you're well-nigh probable required to download together with flash stock ROM firmware on your A21 to permanently right the software errors you lot noticed on your Karbonn A21. And when you lot charge stock firmware on your Karbonn A21 using whatever Qualcomm flash tool, your Karbonn A21 volition hold upward reset to manufacturing flora defaults settings together with past times that, definately, your UserData volition hold upward lost including contacts, messages together with others.
If your device has been bricked together with desire to unbrick it, you lot volition take away to pay closer attending to the tutorials contained below here.
Karbonn A21 Stock ROM Firmware Download Link(s)
1. Karbonn A21 (592517 8550 V000316) Stock ROM
2. Karbonn A21 (592517 8550 V006005) Stock ROM
How to Flash Stock Firmware On Karbonn A21
1. Download your Karbonn A21 stock ROM firmware from the link above.
2. Extract the Karbonn A21 Firmware you lot downloaded from the link higher upward onto a folder on your PC.
3. Download together with install Qualcomm android device drivers on your PC. You may skip this mensuration if you lot accept installed Qualcomm drivers on your PC already otherwise, download Qualcomm drivers here
4. Now, select either of the tools listed below hither to charge the stock firmware on your Karbonn A21.
Note
1. Each of the tools listed higher upward contained mensuration past times mensuration guides amongst illustrated pictures on how to flash stock firmware on your Karbonn A21.
2. If your device is bricked already, I recommend that you lot occupation Tool Studio eMMC Download Tool or QPST QFIL.
3. If you lot require whatever farther assistance, but drib your comment detailing the issue(s) together with I shall assist you lot revive your Karbonn A21, if take away be.