There are a few exceptions in lower price, service which is mentioned below:-
Huawei B153 (If IMEI starts from 34, then don’t place the order)
Huawei B260a (Don’t pay for Orange locked device, code will not work)
Huawei B681-24 (Orange not supported)
Huawei E5172 (Don’t place the order for the E5172Cs model in Huawei E5172)
Huawei E5830 (354 series IMEI is not supported)
Huawei E583 (354 series IMEI is not supported)
Huawei E5172s-927 (354 series IMEI is not supported)