If you are using any of the big 4 (AT&T, Sprint, T-Mobile, Verizon) you are paying way too much, especially since they resell their data to MVNO’s (mobile network virtual operator). As they continue to upgrade their infrastructure and technology your best bet is to hop between networks. Project Fi currently does the best job of this. I have used quite a few of them so here are my reviews on each:
Their basic plan starts at $35/mo (with auto pay) and give you unlimited talk/text along with 2.5GB of data. With their grouping you can easily add more lines with a $10 discount per line. This would be my favorite provider if not for their horrible customer service.
These guys are a steal with a $5/mo Wi-Fi only phone plan that gives you unlimited talk/text. If you move away from a Wi-Fi signal and still want data it starts at $10/mo. They actually do not list the $5 plan anymore but you can still get it by first signing up and then switching to it upon activation. I have not used them in awhile so make sure they are still doing this if you plan on going with them. The only drawback is you can not BYOD (bring your own device).
Project Fi Currently Using
This is who I currently use. There is no BYOD at the moment but they did add some iPads and a Galaxy Tab recently so in the future more devices may be allowed. For now you must use their Google phones but that is not so bad as the Nexus phones are some of the best smart phones around. Plans start at $20/mo for unlimited talk/text and $10 more for 1GB of data but any unused data gets credited back to you the next month. As a bonus, free international texting, free 2G international data (no roaming fees) and calling to India is just a penny a minute! I use my phone on Wi-Fi networks most of the time so this plus the international rate makes it a great deal for me.
These guys are pretty unique in that you can customize your phone bill completely. If some days you use a lot of voice/text/data your bill will be higher and some months of limited use it will be dirt cheap. Their most basic plan starts at $6/mo but you can BYOD device so they are a step up from Republic Wireless in that way. They also just added international calling for a penny/minute.
Ultra Mobile Currently Using
Plans start at $19/mo for unlimited talk/text and limited data. Janishyathi is on the $39/mo plan that gives her 2GB of data plus free international calling to most countries including India.