If I activate a new prepaid SIM to switch over, does this mean that I'm paying double this month (ie. for the monthly plan and also whatever prepaid plan I choose)? I was thinking of getting the $15/month for unlimited text, but my current plan already includes text. so... 1. Am I basically wasting $15 by switching on day 6 of my billing cycle? 2. Is there any way to cancel the monthly plan earlier as soon as I activate prepaid? Thanks!