[Q] Not receiving phone calls while surfing web through Edge!!! - Galaxy Tab General

I have TMo tab with att sim. Done everything like flash, carrier unlock, root, modemswitch succesfully. I was just checking what happens when i am watching online stream video or surf web but i when i called from home phone tab is going to voice message, no rings on tab. But with wifi i can surf, watch videos and am able to receive calls. Any solutions?
Baseband:
JL3_Roto-2G
Build:
Roto-JMI-v2

you can check this thread about why edge cant do voice + data in the same time
http://forum.xda-developers.com/showthread.php?t=940343

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bump for the Sunday crowd...
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