Sourcingbay M281 GSM Wireless Telephone for Home/Office, Support 2G GSM Mobile Network, with SMS, Call Logs, Alarm, Phonebook, Redial Function Ideal replacement of landline cordless telephone, no landline wire is needed. By using 2G GSM SIM card(Not included), you could choose cheaper contract for phone communication, instead of expensive landline package. This cordless office telephone should be used with a standard SIM card(not included) which is satisfied with these 2 requirements: 1. support GSM 2. compatible with 2G network. Please confirm with SIM card seller if your SIM card meets above 2 requirements. GSM desk phone, compatible with 2G GSM carriers e.g. T-Mobile, H20, Straight Talk, and select prepaid carriers. (Not compatible with AT&T since they are shutting down 2G GSM). Not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin. Easy & Simple to Use: LCD display(please peel off screen protector film before usage).Widely used in family house, office, or telephone shops/call shops, etc. Other functions of this desk telephone: SMS message function, Alarm clock; Contacts; Calls logs;last number redial...