How to flash mobile?

Flashing mobile means updating the firmware of your mobile handset. Firmware is the same one like the operating system in your computer. Why one needs to flash a mobile? Because of so many reasons. There are bugs in your mobile's firmware. Or there may have some problems in your operating of mobile phone. Updating your mobile or Flashing your mobile may solve these problems. The official site of your brand name periodically releases the firmware software of your mobile. But remember here, if you believe you are able to flash your mobile, then you may proceed further otherwise it is advisable to take your mobile to your brand name service centre and flash your mobile device. However flashing is as easy as installing a new operating system in your computer. And also remember that formatting your mobile phone and flashing your mobile phone are two different things.
What care should be taken while flashing your mobile or what are the requirements for flashing your device.
If you know that there is an update available for your mobile, then follow the instruction on your brand name official site.
First you must have high speed internet connection.
Second electricity supply should be seamless without breakup, otherwise inverter is a best option.
The data cable should be in good conditions, check all the pins are good condition.
The battery of your mobile should be fully charged.
Please make sure that you have made full back up of your contacts, images and other softwares on your mobile device.