What is an active & compatible SIM card?
The Light Phone II is an unlocked mobile 4G LTE cell phone. It requires an active and compatible Nano SIM card to be installed into the device for it to work.
An active SIM means that it is has a valid plan with a carrier and is ready for use inside the phone. If it is a brand new SIM card, you may need to look at the carrier's specific instructions for how to activate the SIM.
You can learn more about the phone's network and how to find out if your SIM is compatible using our COMPATIBILITY CHECKER.
Although the phone does not have an internet browser, a 4G LTE compatible SIM is required. We chose to use this modern network for its speed, coverage and reliability compared to older networks like 2G/3G which are being phased out.
Inserting the SIM in the phone:
To insert the SIM, find the SIM pin provided in the packaging below the charging cable. Insert the pin to the SIM slot on the left side of the phone. You will feel the SIM tray eject, pull the SIM tray out.
Insert the SIM into the SIM tray, noting the notch on the top left of the SIM. Return the SIM tray to the Light Phone, and power cycle the device OFF and ON.
Entering a SIM PIN code:
Some carriers assign a specific PIN number to the SIM card, to try to prevent the SIM from being used in unintended ways. If the PIN is required, you will be prompted to enter it. This PIN is usually located on the SIM packaging. You might also to try to contact your carrier for you PIN.