When you take on a deal which is on a contract basis with the company providing it, you commit to the company that you will use the same handset and the network that is being provided by them on a very low cost. This contract may be a 12 months or 18 months free line rental. Once you get this done, the fun also starts with you and also some very low expenses in spite of great usage.
A lot of freebies await you once you get such a mobile phone. You may even get the mobile for free. You just have to pay a monthly amount which is fixed for these services. Also, free talk values, free text messages, downloading etc are all available at highly subsidised rates. You can even get your peak hour call rates reduced and also lower your ISD calling rates.
Any hi-tech mobile phones can be taken under this scheme at no extra costs. You can even upgrade to a newer phone if you wish to by just paying a very small charge. You can research through the online dealers who provide you great choices and amazing offers and benefits.