<human>: Summarize the given text in a few sentences.

Where I work I can't have my cell phone on me during the day so I more of less depend on Google Voice to check text messages and voicemails on my PC during the day.  Sprint has been great because of the carrier integration with GV.

I've been on a family plan with my mom with Sprint for over 2 years and my contract is expired, it's been a hassle managing payments to split the check evenly and I would like to switch to a GSM carrier.

I'm looking for an individual plan at around ~$70-75/month after taxes and fees to break about even on the family plan and the T-mobile Monthly4G $30 or $50 plan would be perfect. But I have my concerns with the ability to use GV reliably.

If I port my number to GV and get a new T-mobile number what complications should I expect?  How will MMS sent to my GV number be handled?  How about when I send someone MMS, do they get it from my t-mobile number?
<bot>: On Sprint, use Google voice exclusively right now which is handy with carrier integration, want to switch to T-mobile Monthly plans, what're the implications?