I challenge you as a church member to tell me how much money your church …
Read More »GSM in 219 countries with over 5 billion users
The Global System for Mobile communications (GSM) family of technologies has provided the world with mobile communications since 1991. In over 20 years of development, GSM has been continually enhanced to provide platforms that deliver an increasingly broad range of mobile services as demand grows. The Global System for Mobile …
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