3 Mobile Contract Phone Mobile phone networks these days do more than just offer contract plans with different monthly tariffs. They now also offer plans that have been tailored to fit the mobile phone needs of their customers. This is why 3 Mobile have three types of Three Mobile contract plans. Each 3 Mobile contract phone plan has a different call, text, or Internet services to offer. By knowing what your needs are, you will be able to find choose a plan among 3 Mobile contracts that will give you value for your money.