not repair imei. it is a scam this dongle

For Android 2.x.x:
1- Turn-on the Phone Goto ‘Settings > Application > Development’
2- And Check ‘Usb Debugging’ Then Connect Usb Cable To Phone

For Android 4.x.x and Above:
1- Turn-on the Phone Goto ‘General > About’ Tap 7 times on Build Number’
2- Return to General Tab Tap on Developer Options
3- And Check ‘Usb Debugging’ ON Then Connect Usb Cable To Phone

IMPORTANT NOTE: DON’T CONNECT MULTIPLE ANDROID DEVICE IN USB DEBUGGING MODE AT SAME TIME!
Waiting For Device… OK[WinUSB]
Device Status: [ONLINE]
Model : B8504
Manufacturer : bitel

Serial No. : 0123456789ABCDEF
BaseBand Version : MOLY.WR8.W1315.MD.WG.MP.V35.P3, 2014/12/25 15:24

SW Version : bitel_B8504_V005_20150307_1133

Custom Version : 1425699189

Android Version : 4.4.2
[bitel
]
Built Date : 2015å¹´ 03月 07日 星期å…* 11:41:57 CST

Checking Root Permission… OK
Prepairing… OK
Repairing IMEI1… OK
Repairing IMEI2… OK
Rebooting to Normal Mode… OK
Stopping ADB Service… OK
Operation Time: 00:00:49