Basic Phone required with a budget of about 2500-3000

Hey guys,i need to buy a phone as early as tomorrow morning...it is for an aunt & the specifications i require are it should have a relatively loud speaker & good clarity when receiving calls,second priority is somewhat weird...need a phone which is compatible with the U.S spectrum(Don't know the exact term) since the last phone she had didn't work with the U.S network or something...this is the MAIN PRIORITY as frequent trips are taken to U.S....Pls help me out..its a bit urgent...Thanks a lot....

pls help me out..its very urgent...

bump...help me out ppl..pls begging you