Yes, haha, CM9 was on /radio/modem.bin
then CM10 too, then CM10 move to new MTD partition, and modem.bin goes to /system/vendor/,
then CM10 move back again to another partition (not sure if it is back to same old partition or a new old partition
)
but modem is back to /radio/modem.bin
once it is back to /radio, the one in Wiki will work, regardless of the way it is partitioned. You just need to read inside the zip, the updater script put the modem there.
It is a simple matter of modifying the path within the script for any layout.
Having said that, the older modems in modems thread in dev sticky, they are for pre-MTD time. During original Samsung BML partition, the modem is on a partition of its own, so a more complex method is required to put the modem there, including using CWM (zip) and Odin (tar)
But nowadays is just using Root Explorer and you are ok.
That is why I said you should read the whole thread, you will know such changes happening.
There is a CM10 thread and dev and one in General for discussion.
Ask questions in General if necessary, never on Dev one unless you have issue compiling, or have some other dev bug.
If you are interested on CWM updater script, just unpack the rom zip or the modem zip or any of the CWM flashable zip and have a look at the updater-script within the META-INF.
Edit: regarding AT&T tablet no call, I think it is network related. AT&T know you are on tablet and don't allow making calls. That is my theory.
