Affordable home internet for job applications - any advice?

I use my phone as my only connection. There are 5 people counting on me, so I am trying to be careful. Employers call and email constantly. What else should I consider?

I switched to a low-cost plan through my carrier and cut my bill by almost half.

Thanks for writing this out. I went through something close to it 13 months ago, and it got easier once I kept a simple log of every call and form.