Here is one more Mtk IMEI tool 
Produce :-
- Open tool
- Enter phone Sn ( this is not Important as u like )
- Enter imei 1
- Enter imei 2ed
- Select USB or ultra port ( if u use usb need to press boot key )
- Press start button
Tested On :-
- Mtk6223
- Mtk6225
- Mtk6252
- Mtk6250
- Mtk6253
- Mtk6253B
Here is the Download Link :-
IMEI_SN_Writer_V1.1.rar Note :- This is Old IMEI tool but very powerful tool and easy to use
