- For open Engineering mode in qualcomm chipset processor phone download and install “Shortcut Master Lite app”.
- Open it and click on Menu.
- Search for “Service Menu” Or “Engineering Mode” and select it.
- Now you can change the preferred network.
- OR Dial *#2263# then Select Menu and Click Back again then Select Menu.
- Now go to Key Input and Enter “0000”, Select UE Setting from Popup.
- Select the desired band by going : Configure Protocol>NAS>Network Control>Band Selection>LTE Band>