RingPlus today announced a new mobile phone service plan that is ad-supported, but completely free to the customer. The ads take the form of ringback tones, which RingPlus customers hear on outbound voice calls, after dialing but before the other party picks up. The free monthly plan includes 200 voice minutes, 50 text messages, and 10 MB of 4G LTE data. There are no ads associated with text and data use. RingPlus is also adjusting pricing on its paid plans, which offer larger usage allotments. Plans from $2-10/month offer larger buckets of usage. Plans from $20-50/month offer unlimited voice and text, and data buckets ranging from 1 GB to 5 GB. Overage on all new plans is 2 cents per minute, text message, or MB of data. MMS messages run 4 cents / message, and international texts are 3 cents / message. All RingPlus plans are no-contract and do not carry an activation fee. The new plans will be available from ringplus.net starting June 13th at 3pm. RingPlus is an MVNO using the Sprint network. Customers may use their own Sprint phone, or - starting soon - buy a new phone from RingPlus.