CDMA(technology Relevantquestions Thesaleofgoods–terms …For purposes of comparison, it is for digital mobile cellular services. GSM technology uses three frequency bands: 900 MHz, 1800 MHz and 1900 MHz. Dual-band phonesoperateontwooutofthreeofthesefrequencies,whiletri-band phones operate on all • The use of a SIM (Subscriber…