roaming: unable to place/receive calls

[pjrey]

i have unlimited american roaming with sprint... was working fine... now i am unable to make calls or receive calls in my area (verizon)...
i noticed if i turn off my phone for the night (completely powered off) and try making a call first thing after starting up.. works just fine... but after time, i am unable to use the radio at all, no data, text, phone etc...
what is going on? i have contacted sprint, they were no help at all.. of course. talked to their tier three tech, they said to reload the ROM... i dont want to.. i thought i would ask here first. in sprint area all is fine! everything works perfectly... in some areas roaming it works fine as well...
but where i am currently... ive been having problems the last 6 or 7 days...
sprint says they cannot help me because it shows there is no roaming on the map in my area.. there is, i get 3 bars of service.. in the morning i can make calls... (i originally thought it was only after i used the GPS that the problems would start...) i dont konw if that has something to do with it...
what could be causing this...
i am running the stock NEW spring rom 6.1 on my HTC touch...

any ideas on what i can try?

thanks
pj

[pjrey]

tried making a call this morning, worked just fine.. i think it has something to do with using GPS... once i get a lock, i am unable to receive calls in ROAMING only! in sprint areas everything works fine...
someone please lend a hand...
p