TWRP installation problems I have rooted my SAMSUNG GALAXY NOTE 2 GT-N7100 Android Version Kitkat 4.4.2.   I wanted to install nandroid backup manager for that I need TWRP  to be installed. I lost my SIM network after installing TWRP. That's probably  because of unsupported version of  TWRP 

Can anyone mention  steps for installing TWRP?
TWRP for Samsung Galaxy Note 2 N7100 has the official version of TWRP for your device. It also lists out installation steps using


App
Odin
dd method


This you tube link is also helpful http://m.youtube.com/watch?v=a7z8W6b2CrQ

Flashing Stock

I would suggest you go the odin way. Fool proof way is to first flash stock and then TWRP, since you have a SIM issue. Flashing stock should fix that. Flashing TWRP in the present state may/ may not help in getting your SIM recognised, so it is advisable to flash stock first, check SIM is working and then flash TWRP (of course after backing up data)

If you don't have stock with you, you can download from SamMobile after registering. Make sure you download ROM of the region you stay in.

Odin has different versions and some of the versions have options changed. Hence, the description in guides may differ with options available on the tool. This guide has a good pictorial description corresponding to newer version of Odin 

http://androidmtk.com/flash-samsung-stock-rom-using-odin

Here is one more link (also having stock ROMs) from XDA