BB Bold :: Robotic Sound During Call

i've had my blackberry bold 9700 since 2010. i've been updating it etc to make it work better.. the past few days i've been making calls or recieving calls and the person on the other end when they talk sounds robotic. this has never happened before, and i am also not receiving some phone calls.. or text messages. last night i was trying to phone another cell phone and it would pause and then ring once then go straight to voicemail. when that person tried to call me it kept saying emergency contact. i also never recieved their text messages. i use to lose reception all the time until i updated the software so that works fine now. i am just concerned about this new problem with my phone because its nearly impossible to place outgoing phone calls and incoming phone calls as well.