Official Huawei C199s Stock Rom Used for: Update Huawei C199s Downgrade Huawei C199s Rollback firmware Huawei C199s Unroot Huawei C199s Unbrick Huawei C199s Restore Huawei C199s Fix Unknown IMEI Huawei C199s Repair firmware solutions for Huawei C199s if boot loop, Hard brick, Lost recovery,…