why do text messages from one att phone come in garbled like %^&KYY

[rockhard]

my girlfriend has a blackberry storm 9550.

all works well with only one exception.

when her sister, who has an ATT phone, sends her text messages they appear to be all scrambled.

no other messages from anybody else ever comes in like that....any ideas why this happens?

this is driving both of them crazy and we dont know how to fix the problem.

thanks

Rock