I just did some quick research of current plan offerings from the big three (I didn't look at Sprint) and MVNOs Page Plus (Verizon towers), Cricket (AT&T towers) and Project Fi (T-Mobile and Sprint Towers, and wi-fi calling):
- for a single smartphone (I was surprised by the AT&T $40 device charge.)
- for plans that offer unlimited voice and text.
- not including all the VZW tiers above 18 GB (they even offer a 100GB plan for a mere $750).
- only reporting 4G LTE limits. (some plans throttle at the limits, other plans automatically add charges for more 4G).
AT&T offers rollover data for one month.
T-Mobile offers rollover data for one 12 months for their 3GB and 5GB plans.
T-Mobile unlimited data plan allows 7 GB of hotspot data, and includes some kind of Rhapsody music ("Rhapsody unRadio").
T-Mobile plans offer free streaming music ("Music Freedom") without using data, when on their network from select music providers (Pandora and iHeart Radio were given as examples).
Cricket offers a $5 discount for signing up for Auto Pay, which I applied.
Cricket offers Group Save Discounts for additional lines: $10 off 2nd line, $20 off 3rd line, up to $40 off the 5th line.
Project Fi has a $20 base charge for unlimited talk and text, plus a $10/GB data charge, with a credit applied for any unused data.
[table="width: 500"]
[tr]
[td][/td]
[td]VZW[/td]
[td]AT&T[/td]
[td]T-Mobile[/td]
[td]Page Plus[/td]
[td]Cricket[/td]
[td]Proj. Fi[/td]
[/tr]
[tr]
[td]1GB[/td]
[td]$50[/td]
[td][/td]
[td]$50[/td]
[td][/td]
[td][/td]
[td]$30[/td]
[/tr]
[tr]
[td]1.5GB[/td]
[td][/td]
[td][/td]
[td][/td]
[td]$40[/td]
[td][/td]
[td][/td]
[/tr]
[tr]
[td]2GB[/td]
[td][/td]
[td]$70[/td]
[td][/td]
[td][/td]
[td][/td]
[td]$40[/td]
[/tr]
[tr]
[td]2.5GB[/td]
[td][/td]
[td][/td]
[td][/td]
[td][/td]
[td]$35[/td]
[td][/td]
[/tr]
[tr]
[td]3GB[/td]
[td]$65[/td]
[td][/td]
[td]$60[/td]
[td][/td]
[td][/td]
[td]$50[/td]
[/tr]
[tr]
[td]5GB[/td]
[td][/td]
[td]$100[/td]
[td]$70[/td]
[td]$55[/td]
[td]$45[/td]
[td]$70[/td]
[/tr]
[tr]
[td]6GB[/td]
[td]$80[/td]
[td][/td]
[td][/td]
[td][/td]
[td][/td]
[td]$80[/td]
[/tr]
[tr]
[td]7GB[/td]
[td][/td]
[td][/td]
[td][/td]
[td]$70[/td]
[td][/td]
[td]$90[/td]
[/tr]
[tr]
[td]10GB[/td]
[td][/td]
[td][/td]
[td][/td]
[td][/td]
[td]$55[/td]
[td]$120[/td]
[/tr]
[tr]
[td]12GB[/td]
[td]$100[/td]
[td][/td]
[td][/td]
[td][/td]
[td][/td]
[td]$140[/td]
[/tr]
[tr]
[td]15GB[/td]
[td][/td]
[td]$140[/td]
[td][/td]
[td][/td]
[td][/td]
[td]$170[/td]
[/tr]
[tr]
[td]18GB[/td]
[td]$120[/td]
[td][/td]
[td][/td]
[td][/td]
[td][/td]
[td]$200[/td]
[/tr]
[tr]
[td]Unlimited[/td]
[td][/td]
[td][/td]
[td]$80[/td]
[td][/td]
[td][/td]
[td][/td]
[/tr]
[/table]