Can I make phone calls and send text messages in England?

Yes, British calling cards can make calls and send messages in China, and they should use the network of China Mobile.

There are different companies' calling cards in Britain, which they can use when they return to China.

But you should pay attention to the following points:

If it is a stored-value calling card, you should recharge it before returning to China to ensure that your mobile phone has a certain balance, so that you can roam in China.

If it is a monthly card, you'd better call the telephone company to remind you before returning to China, so that the general telephone company will not restrict the use (otherwise, sometimes the telephone company may mistakenly think that the calling card has been stolen). Moreover, it is said that some telephone companies have special discounts on roaming, so you need to ask first.