Originally Posted by Banished Angel
For a single person to have a smartphone in the US it is approximately $100 a month with AT&T or Verizon, $85 a month with Sprint, and $60 - $80 a month with T-Mobile on a 2 year contract.
With prepaid options through T-Mobile, subsidiaries of Sprint, or other companies that run off of T-Mobile or AT&T's networks you can get away with $25 - $50 a month off contract.
What are prices like in the UK?
Well in my case I have a 12 month contract, SIM-only, i.e. no handset tie in, £10 a month (~$15). For that I get 300 mins to any network, unlimited SMS and 1GB of data per month.
In the case of a decent subsidized smartphone, you're looking at around £30 - £40 ($50 - $65) a month for the same sort of usage tariff, perhaps with an upfront payment for the top of the range handsets, maybe £50 - £150.
Just picking 02 (a mid-range operator) and the Galaxy S3 as an example, £36 ($58) a month, £50 upfront for the phone, unlimited calls, unlimited sms, 1GB data, 24 month contract.
Also worth noting, Consumer Prices in the UK are on average 29% higher than the US. So this seems to be bucking that trend.