Looks like the OP will make this a regular thing. I don't buy it because if I were getting bad reception in those areas which I highly doubt I would switch carriers. I'll prove the coverage to you and call
******** on your claims:
Santa Rosa:
San Jose:
San Fransisco:
Here's the legend for you to decipher the map:

You can see there is plenty of coverage. You seem like someone trying to get over on credits.
That's like me complaining that I don't get service in NEW YORK CITY, which is impossible.
Guess what though? There's a record of how much credit they give you and eventually they'll stop giving you credit. Your account will be forwarded to fraud and they will investigate. Doing this ruins it for people who actually need to be compensated for their troubles. They have a certain set limit per day as to how much credit they can give out. You should be more honest. The only thing I can think of for your bad reception issues is a bad
SIM CARD which is highly unlikely that ALL of your phone have a bad SIM. And you call it saving money....