I personally like T-mobile's plans, simply because they have the best overseas and roaming rates. I have a Samsung phone and a blackberry, both of which are excellent.
It depends on what it is you are looking for from your service provider. Cricket and many of the no frills networks provide cheap reliable local service. However, if you plan on doing a lot of traveling or visiting remote areas Verizon might be for you.
From my view of point cingular sim card is best and cellphone i prefer to have sony ericsion or motorola.. Because functioning of both the cell is best and in this both you have to choose than sony.. Its best cell