Question: when are bt calls free?
Answer: Unlimited Evening and Weekend Calls. This plan gives you inclusive unlimited calls to UK landlines and 0845 and 0870 numbers from 7pm to 7am Monday to Friday and all weekend. "Inclusive" means calls of up to an hour to UK numbers beginning 01, 02, 03, 0845, 0870, (except indirect access, ISPs and Channel Islands).