Page plus is a MVNO on Verizon's network. I used Lise's existing phone with a new SIM and dropped our monthly rate from around $70/mo down to $30 due to our low usage patterns for data, messaging, and texting.
Works out to about $500/yr difference so we can buy a new phone every year if we want to and break even - but we tend to skip upgrades until a new keyboard phone comes out anyway. Our last "upgrade" was a replacement Droid4 from Ebay for $50.
If you are looking for a budget 4G phone you may want to check out your options with Page Plus. So far in the first month, I'm happy with them.
*Set-up involved multiple calls to Indian accented call centers, not sure if offshore but could very well have been. I watch a lot of cricket so I'm good at Indian accents now.