yep
check
A) * 1x data (will block all calls - go directly to voicemail as I dimly recall from the "vision" days)
B) * setting a ringer that is on the storage card.
C) * too much crap running (no free memory)
D) * slot cycle index, change to 1
The last one is the fix, if all the others are not the problem
Test 1:
Call cell from home phone. Count rings you hear before your cell rings (if at all)
If no ring, Look at mogul... if it says 1X and the arrows are solid, you're screwed. Move to an EVDO area, or try not to use data services. If not (A) move on...
Test 2:
Soft reset cell, try again. Better? Then (C) is likely the issue.
Test 3:
Set ringer to vibe only, try again... Better? Then (B) is likely the issue. Move ringer to internal memory, retest. Better? There you go.
Test 4:
If none of that helped, then you really really should change your SCI to 2 or 1, and then try again. Actually, you should change it no matter what
Best of luck.