Hi dear client,
I'm an experienced Linux admin and have rich background in shell scripting, so I'm ready and eager to work on your issue as soon as possible.
After reading your project description and also your other similar project (https://www.freelancer.com/projects/linux/fix-linux-bash-script-raspberry/details) a question has raised for me and that is: is your problem related to a shell script or to the dongles setup and wvdial?!
If you can initiate a chat, we both can better talk about your issue and finding the best solution.