Yes, call your carrier. Or better yet, get whoever deals with your carrier to call their account manager and get the right person to speak to.
I had this problem about 8 or 9 years ago but it was driving down the highway to work and back where I got frequent drop outs. One day the carrier called me to check on my serivce levels and I complained about this. Next thing I knew, towers were going up around this highway and everything was fixed. 8 months later I got a follow up phone call from the carrier who wanted to make sure everything was to my satisifaction now...
