T-Mobile

T-Mobile CEO John Legere announced new initiatives for businesses and consumers at its Un-carrier 9.0 event in New York on Wednesday. The company explained its plans to simplify wireless pricing with its new "Un-contract" initiative and said it would pay "outstanding device payments" for new customers who drop their current carrier and switch to T-Mobile.

T-Mobile promised its current subscribers that their Simple Choice rates would never go up as long as they remain customers, and that users with unlimited 4G LTE plans will be able to keep the same rates for a minimum of two years. T-Mobile hopes to put an end to the practice of offering short-term promotions to woo customers, just like it did when it ended long-term contracts with its Un-carrier initiative in 2013.

AT&T fired another salvo in the ongoing battle between mobile carriers today. Responding to T-Mobile's Data Stash announcement, AT&T launched Rollover Data. Long-time AT&T subscribers will recognize the Rollover concept, which was applied to voice minutes in older calling plans. Rollover Data makes it possible to carry over an unused data allotment into the following month.

This can help prevent overages and additional costs for eligible customers. The Rollover Data is shareable between devices, and will expire at the end of the rollover month if not used. The entire cycle begins again with each billing period. Rollover Data is set to begin on January 25, but what plans are eligible for the feature?

Both AT&T and T-Mobile have negotiated a settlement with the FCC after charging customers for third-party message subscriptions. This practice is also known as "cramming," where carriers add unauthorized charges to a customer's bill for other companies. The charges are normally listed as something innocuous like a $1.99 "service fee" which causes them to go unnoticed on a customer's monthly bill. You may be entitled to a refund for bogus charges if you have ever received daily horoscopes, dieting tips, dating advise, etc. on your cell phone. Here's how to find out if you qualify for a refund from AT&T and T-Mobile:

AT&T agreed to pay $105 million to settle with the FCC. Some of this money will be refunded to customers who apply before May 1, 2015. You can visit this website and enter your email address or phone number to apply for a refund online.

It's unclear why anyone would want to watch a live webcast of T-Mobile's Un-carrier 8.0 event, but the option will be available to those who do, thanks to Yahoo! News. The event will take place on December 16, at 10:30am EST / 7:30am PST. T-Mobile CEO John Legere will be answering questions live during the event. You can visit newsroom.t-mobile.com for a link to the live webcast starting tomorrow morning, and tweet your questions to @TMobile with the hashtag #Uncarrier8, once the event kicks off.

T-Mobile promises to deliver all the details on their "next market changing move" during the live event.

“Uncarrier 8.0 is ready to roll, and you’re invited to join us for the unveiling of one of our biggest and boldest moves yet. This one is so big we had to keep it a surprise.”