[Galaxy Note II Android Development] logosA:
Lets take a LOOK to this problem and see if we can all together find a solution to that.

Your IMEI (International Mobile Equipment Identity) is transmitted to the Network provider the moment you switch ON your phone

It is used by your Network to identify the following

1) The first two numbers is RBI (Reporting Body Identifier) = who registered that type of phone ( verify here )

2) The next four numbers is TAC (Type Allocation Code) = what type of unit and its complete specifications

3)The next two numbers is FAC (Final Assembly Code) = who manufacture it

example :-

01 AEG

04 Samsung

07 Motorola

10 Nokia

30 Ericsson

41 Siemens

50 Bosch

51 Sony

4) The next six numbers is the Serial Number of the Phone

5) The last number is sort of a check sum, that verifies the previous numbers

Combined a total of 15 numbers is used by your network to get the complete information about your phone

It is clear that Flashing custom ROMS can cause your IMEI to Change or get deleted as they may be ported from another manufacturer or from another version of the same manufacturer as the IMEI embedded in the chip of your phone.

THATS EXACTLY WHAT HAPPEN TO YOUR PHONE.

eclipse rom was ported from another version of the same manufacturer as the IMEI embedded in the chip of your phone, a Note 4 rom ported for a Note 2.

So what can be done?

in order to resolve this problem unfortunatelly is not a single road for every one and it varies from phone to phone and rom to rom.

possible fixes are :

1. you have to return to its original firmware to recover your embedded IMEI and do a progressive upgrade . eg. from KIT KAT to Lolipop before going on to MM and finally to Nougat roms.

2. its the way found out for your self, flashing N7100 IMEI Baseband Repair.zip

3. https://xdaforums.com/xperia-sp/general/how-to-fix-network-baseband-missing-imei-t2865378

4. https://xdaforums.com/showthread.php?t=2420881

5. https://xdaforums.com/showthread.php?t=1922473&highlight=efs+backup

since now you have found and have saved your IMEI /EFS/MODEM, I would suggest that you try the 2nd method first and see if its working for you, since you have found users here to confirm that they have done it successfully.

But its always up to you to find the best way for you and your phone.

many of these information have found here and here

advanced search of XDA did help me on this, I hope you finally find your way to fix that

GOOD LUCK

---------- Post added at 07:07 PM ---------- Previous post was at 06:41 PM ----------

HAVE YOU updated your TWRP so far? Have you updated your recovery from 3.02to 3.1.1 that the dev of this rom also has created for us?

https://xdaforums.com/galaxy-note-2/orig-development/recovery-t3589010

Boot loop after flashing a nougat rom is a thing we have seen happening alot of times In RR latest roms and also in Lineage rom, but is the first time that I, personaly have seen that happen in this particular rom.

It could be anything causing it and simplest of them all is your battery's status, so are you sure its everything ok there?

Have you tried to first boot after flashing, having plugged your phone to a wall charger to give it the extra power that is needed if your battery cannt?

so resuming I would suggest:

update your recovery to latest.

Full charge your phone

boot in recovery and make a factory reset> advanced wipe(everything)> format data> flash rom> flash gapps> clear cashe and and Dalvick> reboot phone.

In that last reboot have your phone plugged to wall charger, just in case

good luck my friend and report if and what have solved the problem