HTC One X is available on all the three carriers for free with a minimum contract of £36 per month for two years while HTC One S is available for free on all three carriers with a minimum contract of £31 per month for two years. The devices will be delivered starting from April 6th.
There are also other plans available with which the devices may cost you from minimum upfront of £30 to a maximum of £130 for HTC One S and £60 to £180 for HTC One X. The actual amount will depend on the plan and carrier you will choose.
In addition to this you will also get HTC Medialink HD to stream your phone to TV for free when you pre-order. To pre-order visit the links below: