What is the EFS backup and SuperIMEI backup?

[manabb]

When do i need them?

If i update/flash phones lower version to newer version and the phones get problem, then will that backups work on that updated/flashed phones?

please

[AsiaGSM™]

Originally Posted by manabb

When do i need them?

If i update/flash phones lower version to newer version and the phones get problem, then will that backups work on that updated/flashed phones?

please

The wonderful world of NV, EFS, and all the inherent dangers that come from messing with this. For those of you who have no clue as to what I am talking about, there is a dark, really deep and well protected section of your device that is virtually immune to any kind of flashing and manipulation (unless of course you know how to access it). This part of the device contains information such as IMEI (or MEID and ESN in the case of CDMA devices), programming parameters for the device such as your account information (phone number, etc), data provisioning parameters, and a whole bunch of other things that, when not handled properly, can render a device completely useless.

yes that backup will work