Ну вообще то и без проблем делается и с помощью z3x
Код:
Selected model: S3100
Selected com port: COM5
Selected speed port: 460800
Please, connect phone and press shortly power button
Phone Detected
Sending loader1... OK
ARM version 3B11
Sending loader2... OK
Flash ID: 00EC2206000100000024
Start TFS format... OK
Start NOR flash
NOR flash - ok
Start Flash TFS
Mount TFS - ok
Create DIR - ok
TFS flash - ok
Start Flash CSC
CSC format - ok
Mount CSC - ok
Create DIR - ok
CSC flash - ok
Write signature - ok
Download - ok
Elapsed time: 1805 second, sw ver: 3.5.0027