![]() The widespread use of the GSM standard has made it easy for most mobile phone users to use their phones overseas thanks to roaming agreements between operators using the same GSM standard. GSM is used by about 80% of all mobile phones - approximately 2 billion people across more than 212 countries. GSM stands for Global System for Mobile Communication and is the most popular 2G mobile phone standard in the world. The second form is DSA which means both SIM cards can work at the same time and both receive calls and perform other tasks. The first form of Dual-SIM device is a DSS that requires the user to specify which SIM card is the active and which is placed in standby. This feature has yet to make a big impact in North America or Europe, but has found increased popularity in Asian markets and is slowly becoming a standard feature. ![]() IPS TFT 16M colors 480 x 854 px (4.70″) 208 ppiĬommunication and messaging/data transferĭual-SIM - A Dual-SIM compatible device means that it can carry two SIM cards simultaneously, typically in two different forms.
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