RLSOCO Hard Case for Huawei E5576 /E5783/E5577/ E5330 Portable 4G Low Cost Travel Wi-Fi-Fits for Huawei E5576-320,E5783B-230,E5577Cs-321,E5783B-230 E5577S Model (Case Sale Only): Amazon.co.uk: Computers & Accessories
How to unlock Germany T-Mobile Huawei E5577Cs-321 firmware v 21.333.63.01.55 - YouTube