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John's Phone is a minimalist mobile phone that claims to be the world's most basic cellphone, allowing the user only to make and receive calls, with none of the features of modern smartphones such as a camera, internet access and text messaging. Phone numbers and addresses are written on a small physical paper booklet stored on the back.
5: Modem & GNSS, Wi-Fi & Bluetooth, microphone, rear camera, front camera, audio jack [25] (DIP switches inside back cover [2]). No kill switch for other sensors. [6] 2015 Allwinner arm64 (Allwinner violates the GPL) [2] Quectel EG25-G. Ships with proprietary firmware isolated from CPU with a USB bus.
Phones natively running these are included. There are multiple projects to implement mainline Linux on mobile phones. Mobian is an open-source project focusing on Debian GNU/Linux on mobile devices. [12] postmarketOS is based on the Alpine Linux. [13] Arch Linux ARM based Manjaro is focusing on PinePhone hardware. [14]
Pew Research Center data shows that 9 in 10 U.S. adults have smartphones and another 7% have mobile phones that are not smartphones. Among younger adults, smartphone access is also nearly universal .
This has the potential to threaten telecommunication operators (telcos). Smart phone mobile ad hoc networks can operate independently and allow communications among smart phones users without the need for any 3G or 4G LTE signals to be present. Wi-Fi ad hoc mode was first implemented on Lucent WaveLAN 802.11a/b on laptop computers. Since Wi-Fi ...
Later 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadband access of several Mbit/s to smartphones and mobile modems in laptop computers. This ensures it can be applied to wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV technologies.