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A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Most modern mobile telephone services use a cellular network architecture, and, therefore, mobile telephones are often also called cellular telephones or cell phones. In addition to telephony, 2000s-era mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming, and digital photography. Mobile phones which offer these and more general computing capabilities are referred to as smartphones.
A factory reset, also known as master reset, is a software restore of an electronic device to its original system state by erasing all of the information stored on the device in an attempt to restore the device’s software to its original manufacturer settings. Doing so will effectively erase all of the data, settings, and applications that were previously on the device. This is often done to fix a software issue that the device is facing, but it could also be done to restore the device to its original settings. Such electronic devices include handheld computers such as PDAs and mobile phones. Since a factory reset entails deleting all information stored in the device, it is essentially the same concept as reformatting a hard drive. Pre-Installed applications and data on the card's storage card (such as a MicroSD card) will not be erased. A factory reset should be performed with caution, as it effectively destroys all data stored in the unit. Factory resets can often fix many chronic performance issues such as freezing and will not remove the device's operating system
mobile virtual private network
A mobile virtual private network (mobile VPN or mVPN) is a VPN which is capable of persisting sessions across changes in physical connectivity, point of network attachment, and IP address. The "mobile" in the name refers to the fact that the VPN can change points of network attachment, not necessarily that the mVPN client is a mobile phone or that it is running on a wireless network.
In computing, data recovery is a process of salvaging (retrieving) inaccessible, lost, corrupted, damaged or formatted data from secondary storage, removable media or files, when the data stored in them cannot be accessed in a normal way. The data is most often salvaged from storage media such as internal or external hard disk drives (HDDs), solid-state drives (SSDs), USB flash drives, magnetic tapes, CDs, DVDs, RAID subsystems, and other electronic devices. Recovery may be required due to physical damage to the storage devices or logical damage to the file system that prevents it from being mounted by the host operating system (OS).
Basics of mobile communication and electronics
Study of Digital Electronics
Assembling & disassembling of different types of mobile phones
Use of various tools & instruments used in mobile phone repairing
Details of various components used in mobile phones
Study of basic parts of mobile phones (mic, speaker, vibrator, LCD, antenna, etc)
Testing of various parts with multimeter
Use of surge machine (DC Supply)
Introduction and study of Printed Circuit Board (Motherboard)
Soldering & desoldering components using soldering iron
Fault finding & troubleshooting
Steps for repairing hardware and software problems
Circuit tracing, jumpering techniques and solutions
Troubleshooting through schematic diagramsTroubleshooting through schematic diagrams
Repairing procedure for fixing other new hardware faults
Advanced troubleshooting techniques
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