T-Mobile Simply Prepaid has many plans for you to choose. Our Simple Choice plan has unlimited talk, text & data while on our network with no overages. The Univision Mobile plan offers unlimited wireless plans with international texts and calls to mobiles and landlines in select Latin American countries from our U.S. network. Our Ultra Mobile plan has Unlimited International Talk & Text with 500MB of 4G LTE. The GoSmart Plan has no annual contract, payment charges on a real national network.