For all Huawei, the SIM unlock code is available, meaning Huawei E5771s-856 can easily be unlocked with the unlock code. This is an easy and safe way through IMEI to unblock Huawei. You can unlock all Huawei E5771s-856 devices worldwide on any network. You can use all GSM SIM cards anywhere in the world, regardless of region, once the restriction has been removed.
Only a 15-digit IMEI is necessary to unlock your phone/modem/router. By calling *#06# on the phone, the 15-digit IMEI can be found. For a modem/router, from its settings, you can verify the correct IMEI.
The unlocking of the Huawei E5771s-856 by code does not prevent warranty. This is the method recommended by the maker of Huawei to unlock by code. The unlocking code for Huawei E5771s-856 is from the manufacturer’s or network provider’s database, which means it will work 100%. Depending on the phone, you can get up to 04 codes for Huawei E5771s-856 from the database, including:-
NCK – Network code for eliminating the primary network restriction of Huawei E5771s-856.
SPCK - Service Provider Code or Subset Unlock PIN to delete the network cap from the network subset (e.g., Tesco in Great Britain).
SIMLock Block Unlock Reset Key – If you have already attempted to use too many wrong codes on your Huawei E5771s-856, a reset key is used to reset the phone code counter.
Note:If you order the Huawei modem/router unlock code, you'll just get NCK (Unlock Code).