STEPS YOU HAVE TO FOLLOW :-
- download unlock pack (you can download it from here ).
- Then extract unlock pack [u can need extractor](you Can Download it from here ).
- Then insert your Data Card With Default Sim
- Now Go-to Huawei Firmware And Install
- Then if You are asked huawei unlock/flash code please use Huawei Unlocker (included with unloack pack) or u can use online calculator click here..
- Then Put You IMEI number in IMEI box and Find Flash code
- Then put it on Flash code box and You are done now you can use any sim in your E-1550