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2. Cellular frequencies - Wikipedia

   en.wikipedia.org/wiki/Cellular_frequencies

   Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones; with such a phone one can travel internationally and use the same handset. This portability is not as extensive with IS-95 phones, however, as IS ...

3. Cellular frequencies in the United States - Wikipedia

   en.wikipedia.org/wiki/Cellular_frequencies_in...

   Different cellular companies in the same region may use different levels of cellular technology and different parts of the radio spectrum. In addition to radio frequencies used to connect handsets with cellular base stations, other parts of the radio spectrum are used to interconnect base stations and the wired telephone network.

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.

5. Research shows we touch our cell phones 2,617 times per day - AOL

   www.aol.com/article/2016/07/13/research-shows-we...

   The typical cell phone user touches his or her phone 2,617 time every day, according to a new study -- and that's just the average user. Research shows we touch our cell phones 2,617 times per day ...

6. The Average American Spends $1,342 per Year on Phone ... - AOL

   www.aol.com/average-american-spends-1-342...

   One of the reasons for inflated cell phone costs is that the “big three” wireless carriers — AT&T, T-Mobile and Verizon — dominate the market. ... it’s worth checking your average data ...

7. List of countries by smartphone penetration - Wikipedia

   en.wikipedia.org/wiki/List_of_countries_by_smart...

   This is a list of countries by smartphone penetration.These numbers are based on the top countries by percentage of population owning a smartphone (so smaller countries are absent) and come from Newzoo's Global Mobile Market Report (the numbers were last updated in June 2021).