1. Remove SD Card from phone.
2. Enter cwm recovery mod
- Go to advance & Wipe davlik cache.
- Go back, then go to Mounts & Storage & Formated all mounts.
- Go back & Wipe cache partition.
- wiped data/factory reset
- Go to advance & power off.
3. Enter download mode on fon(power button + home button + volume down button, press all at once)
- then press volume up button,
- open Odin application on computer & connect the phone,
- In Odin click options & activate Nand erase all.
- In Odin click AP & add the firmware u downloaded.
- After the file appears in AP, click start & wait until Odin shows success.
- Unplug the phone from computer & let the phone boot.
After phone is set, dial *#06# to confirm that IMEI is changed to 0/00.
4. Now use NV Items Reader-_Writer v1.0 to write the imei back to its normal state.
Note: For help with NV Items Reader-_Writer v1.0, contact me on email@example.com free of charge.