The size and type of phone that you need is usually determined by the options you want to include. If you are planning on using the phone to send and receive email, then you will need one of the higher-end phones that are Internet ready and that comes with t a plan that offers economy rates for data transmission. If Internet usage is not desired, then you can get all the features you need in a phone that is much less in price.
Quite often, there is a reduction in the cost of the phone with the purchase of a plan. The best wireless plans generally are either a one-year or a two-year contract. Before you sign up for service, be sure you have a clear understanding of the terms of contract termination. If you have to move or otherwise break your contract, there can be a sizeable penalty which can at times be equal to the monthly repayment multiplied by the number of months remaining on the contract, so it is important that you know and understand every part of the contract before you sign it and are aware of any exit clauses that exist.