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Unlocking the bootloader allows installing and running unsigned code on a device, including user customized software. Operating outside the manufacturer specification might usually result in voiding any warranties and may make the device susceptible to data theft, as the integrity of the operating system (as intended by the manufacturer) can no longer be guaranteed. [1]
Open QTMoko/OpenMoko phones of Qt Extended are included to the list. Note that it is often possible to install a wide variety of open-source operating systems on any open-source phone; the higher-level software is designed to be largely interchangeable and independent of the hardware. [16]
After switching on the phone, if the PIN security function is active, the user is required to enter a 4-8 digit PIN to unlock the SIM card and connect to the mobile network. Without this, functions such as phone calls (except for emergency calls), text messages and mobile data will not be available.
On recent phone models running Android software, the phone will display a message saying "SIM network unlock PIN" or "Enter Network Lock Control Key" if network locked. Windows phones will display the message, "This SIM card can only be used on specific networks. Contact your customer service center for the unlock code".
A mobile operating system is an operating system used for smartphones, tablets, smartwatches, smartglasses, or other non-laptop personal mobile computing devices.While computers such as typical/mobile laptops are "mobile", the operating systems used on them are usually not considered mobile, as they were originally designed for desktop computers that historically did not have or need specific ...
Optus Mobile customers reported that their phones showed 'SOS' on the signal indicator, which is a sign the regular network is down, but mobile phones still have access to alternate networks in the event of an emergency call by using a so-called camping mechanism; however, Optus landlines were unable to make emergency triple-zero calls.
In September 2014, Optus launched LTE Carrier Aggregation in Sydney, Melbourne, Brisbane and Adelaide. Optus markets LTE Carrier Aggregation as "4G Plus". Optus combines two 20 MHz channels of 2.3 GHz spectrum. [6] In Brisbane, Optus has up to 4CA band combinations using Band 1, 3, 7, 28 and the total bandwidth is 55 MHz.
Digital Phone Company Ltd. Not operational: GSM 1800: Owned by AIS; network shut down in October 2019 [108] [114] 520: 25: WE PCT: True Corporation: Not operational: PHS 1900: In Bangkok area 520: 47: dtac-T, True-T: National Telecom Public Company Limited: Operational: TD-LTE 2300: Former TOT Public Company Limited; LTE band 40; for dtac and ...