While selecting the right cell phone service plan at your carrier of choice is a supremely important decision that impacts your bottom line, so is choosing the right service carrier in the first place.
Do you use service in major U.S. cities? Do you travel internationally and need affordable (or free) roaming? Do you use service in rural U.S. areas?
These questions are important for you to answer before selecting a cell phone service carrier or changing to one that better suits your needs.
In making that choice to fit your unique situation, you’ll need to understand what’s underneath the major cell phone service carriers and how their underlying technology standards differ.
What is GSM vs. CDMA vs. TDMA service? This article helps to clear the confusion.
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China Standard launched the first Dual mode phone with 1 RUIM and 2 SIM built in. The handset is built in 1 CDMA-RUIM card and 2 GSM-SIMs working and standby simultaneously. With the 3 cards inside, the phone supports two GSM networks and one CDMA network. Besides full multi media features such as 2.0 M pixel camera, MP3, MP4, Bluetooth and FM radio, the phone support a analogue TV reception function. The mass production of this model will be in beginning of March and it is estimated that the total delivery worldwide will be about 100,000 units in 2009.