Sprint is back at it again with a new offer to try and entice customers to switch to its network, and this time the carrier is claiming customers who switch can save 50 percent on their bills. If you are an AT&T, Verizon or T-Mobile customer, Sprint is saying that you can save big when switching, though this is only good on most plans, not all. The new promotion is a way of celebrating network expansion and speed increases that Sprint has been working on.

So, how does it work? Well, you bring your existing mobile number from AT&T, T-Mobile or Verizon to Sprint, and the carrier will cut your bill in half. At this time, the carrier does not say which plans are included or excluded, so it's not easy to tell on the surface whether or not your current plan would be eligible for the big savings. If you happen to still be in a contract, Sprint is offering to pay up to $650 per line for your switching fees.

The savings will be good until 2018, at which time they will likely jump significantly, so if you aren't a fan of switching carriers regularly you may want to pass this offer up.

Source: Sprint