You can't cancel your mobile phone before the contract expires. After the contract expires, you can go to the business hall to cancel your mobile phone. You can choose to keep some products, but you need to handle the business again, and you can't continue to enjoy the benefits of the original package (such as the phone bill given in the original package).
Telecom cards charge different fees according to different packages. If you need more talk time, I recommend Lexiang 3G Chat Edition for you, as follows:
You can log in to Anhui Telecom's online business hall to buy mobile phones, handle mobile phone packages, order traffic packages, 3G network cards, broadband packages and other services, and you can enjoy more discounts when you go to the online business hall.
Please pay close attention to the latest preferential activities announced by Anhui Telecom's online business hall and the official Weibo.
Please keep asking questions. I wish you a happy life, thank you!