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2. Cellular repeater - Wikipedia

   en.wikipedia.org/wiki/Cellular_repeater

   A cellular repeater (also known as cell phone signal booster or cell phone signal amplifier) is a type of bi-directional amplifier used to improve cell phone reception. [citation needed] A cellular repeater system commonly consists of a donor antenna that receives and transmits signal from nearby cell towers, coaxial cables, a signal amplifier, and an indoor rebroadcast antenna.

3. OpenBTS - Wikipedia

   en.wikipedia.org/wiki/OpenBTS

   OpenBTS. OpenBTS ( Open Base Transceiver Station) is a software-based GSM access point, allowing standard GSM-compatible mobile phones to be used as SIP endpoints in Voice over IP (VoIP) networks. OpenBTS is open-source software developed and maintained by Range Networks. The public release of OpenBTS is notable for being the first free ...

4. Comparison of mobile phone standards - Wikipedia

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

   GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM . Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.

5. The 6 best cellphones for seniors in 2024 - AOL

   www.aol.com/lifestyle/best-cellphone-seniors...

   Consumer Cellular Verve Snap. Best flip phone for seniors. $59 at Consumer Cellular. SAMSUNG Galaxy A23 5G A Series Cell Phone, Factory Unlocked Android Smartphone, 64GB, Wide Lens Camera, 6.6 ...

6. iPhone 3G - Wikipedia

   en.wikipedia.org/wiki/IPhone_3G

   The iPhone 3G features an internal rechargeable battery rated at 1150 mAh, which, like its predecessor, is not user-replaceable. Apple stated that the iPhone 3G's battery is capable of providing up to six hours of web browsing via Wi-Fi, or five hours via 3G, or 25 hours of audio playback. Alternatively, it is said to provide 300 hours of ...

7. Cellular frequencies in the United States - Wikipedia

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

   There are 51 MTAs, 493 BTAs and 175 EAs in the United States. The Advanced Wireless Services (AWS) bands, auctioned in the summer of 2006, were for 1,710–1,755 MHz, and 2,110–2,155 MHz. The spectrum was divided into blocks: A blocks were for Cellular Market Areas, based on existing cellular (1G) licenses, and were 2 × 10 MHz.

8. List of wireless network technologies - Wikipedia

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

   4G provides, in addition to the usual voice and other services of 3G, mobile broadband Internet access, for example to laptops with wireless modems, to smartphones, and to other mobile devices. Potential and current applications include amended mobile web access, IP telephony , gaming services, high-definition mobile TV , video conferencing, 3D ...

9. List of mobile virtual network operators in the United States ...

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Operates on Verizon's native 4G/LTE network and WiFi calling (no 3G – Verizon will shut this down at the end of 2020 anyway or roaming- some reports of LTEiRA roaming with talk and text). No toll-free customer service #; service provided via in-app chat, text, Facebook, or Twitter; callbacks by request.