I live in a super-rural area and only have dialup, except when I bring my laptop to town and have wireless.
My cellphone works EVERYWHERE. Great coverage, no toll charges, etc.
This is wonderful technology.
Sounds like you need a cell-modem then so you can ditch dialup.
We use cell phones and satellite internet - no land lines, no DSL, no cable and no dial-up. This works very well for our electronic communication purposes in different states and while traveling in the motor home. Long distance and no roaming charges included:)
It really annoys some how I can sit on a beach, or by a lake, etc., in a beautiful remote part of the country and work on-line with a high speed internet connection and cell phone.
Land lines are no longer necessary...