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2. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

3. List of wireless network technologies - Wikipedia

   en.wikipedia.org/wiki/List_of_wireless_network...

   The North American Standards IS-54 and IS-136 were also second-generation (2G) mobile phone systems, known as (Digital AMPS) and used TDMA with three time slots in each 30 kHz channel, supporting 3 digitally compressed calls in the same spectrum as a single analog call in the previous AMPS standard. This was later changed to 6 half rate time ...

4. Cellular network - Wikipedia

   en.wikipedia.org/wiki/Cellular_network

   The most common example of a cellular network is a mobile phone (cell phone) network. A mobile phone is a portable telephone which receives or makes calls through a cell site (base station) or transmitting tower. Radio waves are used to transfer signals to and from the cell phone. Modern mobile phone networks use cells because radio frequencies ...

5. Yahoo! Voice - Wikipedia

   en.wikipedia.org/wiki/Yahoo_voice

   voice.yahoo.com. Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application. [1][2] Yahoo Voice used the Session Initiation Protocol (SIP), GIPS codec and the Dialpad engine for voice transport.

6. Premium-rate telephone number - Wikipedia

   en.wikipedia.org/wiki/Premium-rate_telephone_number

   As there are no longer premium numbers, TV shows now use mobile numbers to receive calls and generate revenue to their program. For the same premium rate purpose, it is used of numbers destined to mobile phones with unusual code of selection of carriers for the purpose of charging a premium rate per minute. Ex: 0 91 41 98401–0101.

7. Making cellphone calls may increase heart disease risk ... - AOL

   www.aol.com/making-cellphone-calls-may-increase...

   Compared with people who made or received calls for 5 minutes or less each week, those who used their phone for: 5–29 minutes had a 3% increased risk. 30–59 minutes had a 7% increased risk. 1 ...