As long as it is a regular online recharge channel, it is credible. For example, QQ Wallet, WeChat Wallet, Alipay, China Mobile, China Unicom, and official telecom apps, such as Wang Feng. Don't trust this new channel of network recharge, especially the software that focuses on recharge discount and takes publicity as its selling point. Not only is it afraid that the recharge of telephone charges is not credible, but there may also be greater risks, such as the theft of funds.
I really don't believe in online recharge. I can go directly to the business hall corresponding to the calling card to recharge and pay for various businesses.