A: Yes. The unlock writes to the NVRAM (non-volatile memory). Updates do not touch that partition.
Most ZTE phones allow only 5 to 10 attempts to enter the code. If you have already tried random numbers, stop immediately. If the phone says "Locked Permanently," a calculator will no longer help. zte sfr 101 unlock code calculator extra quality
Mobile phones, including the ZTE SFR 101, are often sold with a lock that restricts their use to a specific network provider. This lock, also known as a simlock or network lock, ensures that the phone can only be used with the provider's SIM card. While this may not be a significant issue for some users, others may want to switch to a different carrier or use their phone while traveling abroad. Unlocking the device provides users with the flexibility to choose their preferred network provider and enjoy a wider range of services. A: Yes