iPhone 6s: O2 tariffs unveiled, along with plans that let customers get free upgrade after a year

The cheapest deal is for the 16GB phone with 3GB data allowance at £46 a month with a £29.99 upfront cost

Members of the media photograph the new apple iPhone 6s in rose gold after an Apple special event at Bill Graham Civic Auditorium September 9, 2015 in San Francisco, California (Stephen Lam/ Getty Images)

O2 has revealed its tariffs ahead of the release later this month — as iPhones are already selling out.

02 are offering the iPhone 6S in all four colours with 16, 24 and 128GB capacities available. All plans come with unlimited texts and minutes and are 4G ready.

All phones are on a 24 month contract, but some deals come with a free upgrade after 12 months.

Their cheapest deal is for the 16GB phone with 3GB data allowance at £46 a month with a £29.99 upfront cost.

All plans with 20GB data allowance also come with Damage and Breakdown Cover for two years and start at £54 a month with a £9.99 upfront cost on a 16Gb phone. The same plan on the 128GB phone is £59 a month with a £39.99 upfront cost.

O2 recommends the 30GB data plan across all three capacities, which comes with a free upgrade after 12 months. This plan starts at £59 a month with a £9.99 upfront cost on the 16GB phone, while the overall most expensive tariff is the same plan on the 128GB phone at £64 a month with an upfront cost of £39.99.