Use only original nano-SIM cards. Use of incompatible SIM cards may damage the card or the device, and may corrupt data stored on the card.
Both SIM cards are available at the same time when the device is not being used, but while one SIM card is active, for example, when making a call, the other may be unavailable.
Use only compatible memory cards approved for use with this device. Incompatible cards may damage the card and the device and corrupt data stored on the card.