Hello! I'd be happy to help you with unlocking your Globe B312-939 device so you can use your Dito SIM card.
To unlock your device, you will need to obtain an unlock code. The unlock code is specific to your device's IMEI number and is provided by the network carrier. In this case, you will need to contact Globe customer service to request the unlock code for your B312-939 device.
Once you have the unlock code, you can then follow the instructions provided by Globe to enter the code into your device and unlock it. After successfully entering the unlock code, your device should be able to accept your Dito SIM card.
If you encounter any issues or need further assistance during the unlocking process, feel free to ask for help here. Good luck with unlocking your device!