If my Android phone was rooted and I did a factory reset, is it still called rooted, or not?
Yes! It shall still remain rooted under following circumstances.When you factory reset your device using , all your current apps are flushed out and the apps that were installed when you purchased the device will be installed automatically.So, when you factory reset your phone, the then root access of the device shall again be set as it was when bought. Strictly speaking, factory reset gives back the root access to your phone instead of ignoring it for a third party. So, to enjoy the root, you have to go through the process of installing the third party superuser.However, if you try to FACTORY HARD RESET your phone and flash the firmware into it, I'm afraid you may loose the root access for the device's previous operating system shall be replaced by the newer, stock one.
Is it necessary to unlock bootloader before rooting Android phones?
It is not necessary to unlock the boot loader before rooting android devices.Android boot loader helps to load either Andorid ROM or RecoveryIf the boot loader is "LOCKED" then it will verify what it boots. So we can't boot custom recovery like ClockworkMod, TWRP etc, also can't boot custom ROM like CyanogenMod.Unlocking boot loader turns off the verification. Unlocked boot loader will boot all the custom recovery and ROMS.So in case of rooting, sometimes it may be required to install custom recovery, in that situation boot loader have to be unlocked.Image src and more details: Bootloader - XDA-Developers
How do I change the android phone IMEI number without rooting?
Easily Change Android IMEI Without RootingIMEI stands for International Mobile Station Equipment Identity.Now without wasting time, follow the procedure listed below to change your Android IMEI to Blackberry IMEI.Download ‘Mobileuncle Tools‘ from Google PlayStore.Install it and Run/Open itClick ‘Engineer Mode’Click ‘Engineer Mode (MTK)’Now scroll your screen from ‘Right to Left’ sideNow you should see ‘Connectivity as the Option MenuClick ‘CDS Information’Click ‘Radio Information’Now select the sim you wish to change it IMEI, Note Phone 1 is Sim 1 and Phone 2 is Sim 2As many MTK Device comes with 2sim, the Sim 1 is always set default to 3G enableClick ‘Phone 1’Now you should see AT+Now Type ‘EGMR=1,7”Your 15 digit BB IMEI’After typing that click ‘SEND AT COMMAND”You should see a Notification message displayed at the bottom of your phone screen, saying AT command is MsendNote- That one IMEI can be use for 5 different phone, so share yours now. That is the procedure of Changing Android IMEI to Blackberry IMEI.I hope it helps…