It is technically possible to use a US Cellular 8703e as a modem:
1. Install the latest version of Desktop Manager
2. Create a new dial-up account
(use your own number here)
4. Password: 6085551234 (your phone number)
5. Number to dial: #777
This will work and you can connect to the Internet using this. However, this is not supported by US Cellular and they claim it is a violation of the Terms of Service. I have been told that they will send you a warning letter if they are alerted that you are doing this. If you continue, they will send you another letter. Then they will cancel your service the third time.
I use this once and a while, but only when needed. The browser on my 8703e works for most everything I need except for my online banking. I have never gotten a letter. If you were streaming music, downloading huge files, etc. then you'd probably get the letter.