Who knows why some software on mobile phones can't be used for a while? What's going on and how to do it?

There are some softwares that need to be used for a fee, but we can be allowed to try them for a while. After the experience period, these softwares can't be used and some functions can't be used. For example, I installed trader stock software on my mobile phone, which means the experience period is one month. After a month, many functions can't be used.

The operation of some software needs the support of the network server, but the network support can't keep up with it. Or because some software supports wap network, some support cmnet network, and the network support is wrong, resulting in the software can not be used. For example, some versions of Weather Chain and Great Wisdom only support wap networks.

Some are because the software version is not updated in time and does not support the old software, which will lead to the software being unusable.

These problems can be solved by one-to-one correspondence, hehe

Good luck!