I switched to T Mobile from Verizon when I got my new Galaxy S 3. I paid for the phone outright so I get a better rate. $49.99 Value unlimited talk and text and $20 for unlimited 4G and $7.99 for handset insurance. So it is $77.98 plus taxes and regulatory fees.
When I was still on Verizon with a flip phone, I was paying $74.99 for 900 minutes and 250 texts with no handset insurance.
Very happy with this change as I get a lot more for just $3 more with T-Mobile and better signal strength at home as well. This was a no brainer.