A GSM phone is a mobile phone that is powered by the Global System for Mobile Communications. This transmission technology was first introduced to the public in 1991 and has now become the most popular in the world. Unlike analog phones, GSM allows three voice calls to occur in the same time slot....
The term “UMTS” is the abbreviated form for “Universal Mobile Telecommunications System.” This is a type of mobile phone technology, often classified as “third-generation” (or “3G” for short). Aside from “typical” phone features such as calls and voice mails, most 3G gadgets also allow users to...
A RUIM or R-UIM card is a transferable identification chip for mobile phones that belong to the Code Division Multiple Access (CDMA) network. The letters stand for Re-Usable Identification Module. RUIM cards store pertinent personal information, including the name and account number, the cell...
