Payphone with 800, 450 or 1,900MHz CDMA Frequency, Two-way SMS, Voice Mail and Caller ID... Country of Origin:China ( ... to store the incoming and outgoing calls Adaptive to wide range of voltage with low power consumption Fast intelligent dialing numbers ... 90% Payphone with 800, 450 or 1,900MHz CDMA Frequency, Two-way SMS, Voice Mail and Caller ID