My DH and I had AT&T Mobility, and got lousy reception, lots of dropped calls, and limited minutes along with a high bill.
Several of his coworkers suggested Cricket. With some degree of trepidation, we switched. It's been great! No dropped calls, great reception, and unlimited talk/text for only 50.00 mo for each ph. No contract. So if you don't like them you can just switch.
I am just like you. I JUST got a cel phone. I got the Verizon prepaid unlimited monthly plan for $50. You get unlimited minutes, text, and internet, though I haven't figured out how to get anything but the weather on the "internet" part. I really don't want to spend my life on the phone.
If the plan doesn't "disappear" it's OK. Just make sure you buy the phone from THEM or you can't transfer your number over. I got the LG Pantech (I think) for about $120. It has a slide out keyboard, but the keys are so small it's hard to manage.
We are currently on Straight Talk (got sick of Sprint/Nextel during this change-over), haven't personally had problems with it. Also a good friend discovered that they were able to transition their old unlocked phone over to their Straight Talk plan (had lost their phone and found that so called to see if it could be activated - it was unlocked so they did). No Contract - Unlimited Minutes - Unlimited Text - Unlimited Internet (though i don't use mine as much as my husband does).