The cost of calling standard UK 02 numbers on Tesco Mobile varies depending on what tariff you are on. If you have a pay monthly contract, the cost of calling 02 numbers is usually included in your monthly allowance of free calls. However, if you use all of your inclusive free minutes that month, you will be charged for calls to 02 numbers. The cost of calling 02 numbers on Tesco mobile is 25p per minute for calls made outside of your monthly allowance. Tesco Mobile charges 25p per minute for calls on pay as you go mobiles. This is also subject to a surcharge of 10p connection charge for every call, then the cost is calculated per second rounded up to the nearest second.