This post was published in September 2008 and may contain facts or opinion that are no longer current.

T-Mobile vs O2 on Mobile Data

If you could follow along and tell me where I’ve gone wrong with this maths, I’d appreciate it. I spoke to T-Mobile yesterday and the guy confirmed that on my contract, I was being charged 79 pence per kilobyte of mobile data.

My iPhone says that in the last two weeks I’ve had it, I’ve received 56.1 MB (which Google claims is equal to 57446.4 KB).

Multiply the number of kilobytes by 79, you get 4538265.6.

So I’m thinking that the “unlimited” included data I’ve used on my iPhone in the last two weeks would have got me a bill for £45,382.66 from T-Mobile…


By Farhan Mannan on 02 September 2008 at 10:27:

I’d say that the price they gave you was faulty

By Chris on 02 September 2008 at 12:16:

Farhan is right. Otherwise shout at them. AFAIK (and I have a t-mobile contract, and researched this a few days ago) T-mobile offer unlimited* web access a month for £7.50 (incl. VAT) or otherwise charge you as you go for data, and then cap the price at £1 a day, but you can keep on using it to download as much as you desire**

More info here:

* fair use limit for the monthly plan is 1GB a month.

** fair use limit for the daily PAYG option is 40MB a day.

By Chris on 02 September 2008 at 12:19:


“Did you join us before 1 December 2006?

If you did, just text YES to 3064 (free of charge) to make sure you get the £1 a day rate."

(from the page)

By Alex Muller on 02 September 2008 at 17:59:

Makes more sense, but the 79p was what I was quoted on the phone by somebody looking at my account and contract details.

By Farhan Mannan on 02 September 2008 at 20:41:

You should sue them for causing you stress… I’m thinking for around £4538265.60?

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From 08AM on Tuesday September 02, 2008

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