By Marina Lopes NEW YORK (Reuters) – T-Mobile US Inc said on Monday it would stop charging penalties for customers who go over their data plan limits and launched an online petition calling for rival carriers to do the same. Today Im laying down a challenge to ATT, Verizon and Sprint to join T-Mobile in ending these outrageous overage penalties for all consumers – because its the right thing to do, T-Mobile Chief Executive John Legere said in a statement. In January, T-Mobile, which is 67 percent owned by Deutsche Telekom , launched a website where rivals customers can write breakup letters to their carriers and offered to pay up to $350 in termination fees per line for users to switch carriers.