What are Stock and Custom Recoveries?

Android OS are based mainly on Two types of ROMs

Stock ROMs
Custom ROMs

The one Which is installed in the Phone at the time when it is purchased the Company's Installed Genuine OS on Phone is based on Stock ROMS

While apart from this, If we Install Anyone Other version of OS on Phone through Recovery all those OS are based on Custom ROMS

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What are Custom Recoveries? Why we use Them?

Now Guys here we are going to Step in to Tricky Area What are Custom Recoveries? These are Recoveries and Modes you
Choose for your Phone to Install Customized OS on your phone to Unlock features and access.

NOTE: This could be Tricky If you use to Install Wrong Recovery IMG which isn't your Phone's one Then Its 100% Risk.
Beware it may Loop your boot or leads to Brick your Phone which means simply useless Dumped phone.

So Be careful which Flashing Custom Recoveries on your Phone that your Recovery IMG must be of the same phone Model on which you are flashing it.

Step In to Custom Recovery >>

Custom Recovery CWM CyanogenMod Philz TWRP