| Issue | Solution | | :--- | :--- | | | Do not keep trying. The modem has a counter (usually 10 attempts). After that, it permanently locks to the original carrier. You will need a factory reset tool. | | Modem connects but no internet | Your APN settings are wrong. Go to Dashboard > Settings > Dial Up > New Profile. Enter the new carrier's APN (e.g., fast.t-mobile.com or broadband ). | | DC-Unlocker doesn't detect modem | Install the "ZTE MF Series Driver" or switch the modem to "Modem Mode" via the dashboard (disable "CD-ROM Only" mode). | | Unlock code not requested on SIM swap | The carrier firmware has hidden the menu. Use the USSD code *#0808# to access hidden engineering mode, then look under "Network Lock." |
Note: On newer firmware versions, ZTE has disabled these public AT commands. If you get ERROR , you cannot use this method. unlock modem zte m26z1z
This is the most reliable method for non-technical users. | Issue | Solution | | :--- | :--- | | | Do not keep trying
Warning: flashing wrong firmware can permanently brick the device. You will need a factory reset tool