I am on the same boat... I do have this device since a month. Had it rooted with motochopper with out-of-the-box firmware PDA: I337MUMUAMDJ Changelist: 518267 Android: 4.2.2 then unrooted to do the OTA update to the latest released firmware PDA: I337MUMUAMG3 Changelist: 1163001 Android: 4.2.2
Now I tried the motochopper again and it says "failed" and/or that su binary is outdated ??? Do not know what it means, only that don't have su permission. Under about device it does reads "SELinux status: Persmissive" with Baseband version: I337MUMUAMG3
Does the Baseband is locked or what? I do not know a lot... please help! Thanks in advance.