***THIS APPLIES IF YOU HAVE A GOOGLE VOICE NUMBER THAT YOU CONSIDER YOUR PRIMARY NUMBER***
So I know everybody and his/her mothers already knows about the beauty of Tmo's $30 prepaid plan, which comes with 5 GB of LTE data (2G after that), 100 minutes, and unlimited text. I just wanted to add a tip that I thought might come in handy.
My personal situation is the following:
--->Tmo subscriber with Nexus 5 and two phone numbers: Google Voice and Tmo. (I have LTE coverage virtually everywhere I live. No hit or miss.)
--->Ported my old Sprint number over to Google Voice. This is the only number I give out. I don't mind not having full MMS functionality just yet (I can receive MMS from other Tmo subscribers). My Tmo number is just linked to my Google Voice account.
--->I have Hangouts and Google Voice apps/extensions installed everywhere and anywhere: Nexus 10, Nexus 5, laptop, work PC, etc.
--->I have a yearly subscription with Skype ($30/yr) that I use to make calls over LTE. I like the integration with my phone, especially when I use Google to make calls with the "OK Google" detection. The Skype Dialer always comes up as an option, and I'm allowed to decide whether to make calls over Skype or via the phone. (This allows me to show either my Google Voice number or Tmo number).
So my personal setup usually involved answering the calls over Hangouts via my PC, since I always had access to the internet via WiFi or LAN.
But now with the Hangouts and Google Voice integration, I let Hangouts ring whenever people dial my Google Voice number, and I set Google Voice to not ring my personal Tmo number anymore. Whereas I used to debate about whether or not to set up a SIP account, now I don't need one. Hangouts will automatically ring my phone whenever people call my Google Voice number, and whenever I answer the calls, they are automatically answered over LTE. No more worrying about using up my 100 minutes.
This, of course, depends on the user having guaranteed LTE, HSPA+, or even decent 3G everywhere.
With regards to the Skype subscription, I may or may not get rid of it. I like being able to dial using my voice, and the Hangouts Dialer currently doesn't appear as an option for making calls whenever I issue the voice command.
Hope somebody found this useful. Comments welcome.