[AC Question]

see above: How do I find the hex/mei # for my galaxy s6 for registration???

[Paul627g]

It would be located on the box of the device.

Also you would look under Settings/About Phone section.. It will be listed under one of the sub headings/directories in there.

[mico23]

Hex/mei is not a heading in the "About phone" section.... Model number, Baseband version, Kernel version, Build number, SE for Android Status, Hardware version, KNOX version, Configuration version, FCC Certification....

[marKhani]

settings (I use the gear icon)
about device (last item on the list)
Status
IMEI information
There it is, along with IMEISV

Note: I am using Android 6.0.1 Marshmallow

Using my wife's S4 on Lollipop it goes:
Settings
More
About device
Status
...scroll down to EMEI

I have a Galaxt Tab S. Can't find it on there. Maybe because it isn't a phone?