Galaxy S4 change imei successfully, android version 4.3 Baseband without damaging the device, many Box can not repair imei without Damaging Baseband letting your Galaxy S4 with imei NULL!
Printing phone history
Info 2014-02-18 12:46:11 FINISHED
Repair IMEI 2014-02-18 12:34:14 ERROR
Repair IMEI 2014-02-18 12:23:59 ERROR
Repair IMEI 2014-02-18 12:13:02 ERROR
[Repair started.]
Checking serial port...
Available.
Gathering phone info...
Model: GT-I9505
Android Version: 4.3
PDA Version: I9505VJUEMKE
Phone Version: I9505VJUEMKE
CSC Version: I9505ZTMEMKE
Serial Number: RQ1D90GLJMH
Imei: 355998052544588
Checking serial port...
Available.
Repairing imei...
Repair imei stage1 failed. Preparing modem image.
Checking root state...
Rooted.
Getting original modem...
Reading original modem image. Be patient! Do NOT disconnect the phone!
Storing original modem image to local disc.
Getting new modem...
Checking new modem image existence on local disc.
Checking image.
Preparing new modem image.
Waiting for battery remove/replace...

Disconnect usb cable.
Remove battery and wait few seconds.
Replace battery.
Power on the phone.
Reconnect usb cable.
Phone removed.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Sending new modem...
Writing new modem image. Be patient! Do NOT disconnect the phone!
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Checking modem version.
Retrying to repair imei.
Checking serial port...
Available.
Repairing imei...
Repair imei successful.
New imei: 352030147936984
The phone will restart automatically. Be patient! Do NOT disconnect the phone!
Waiting for restart...
Waiting for restart. Be patient! Do NOT disconnect the phone!
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Restoring original modem...
Writing original modem image. Be patient! Do NOT disconnect the phone!
Modem restored.
Restarting phone.