Huawei ETS5623 landline telephone has GSM wireless system with single SIM support. With a rechargeable Li-ion battery that can last up to 48 hours after the power goes out. Works in all environments, including remote villages and locations. It has s strong telephone network signal, FM radio, support for any GSM SIM card, high-quality voice service, TD-SCDMA 3G network, and GSM 2G network seamless switching, robust cellular services, big buttons.
Highlights

Single SIM support
Write/ send and receive messages function