The mobile phone was stolen and has a password lock. Can they see the information inside after unlocking? There are photos and messages in it.

Not if it has its own memory. Because they are usually hard-booted directly, the memory will be formatted. But if your important things are on the external memory card, it's very simple. Take out the card and plug it into the computer. Computers can read everything. It's hopeless.

If it's an iphone, it's useless to unlock the phone. You need the original of your ID card. Even if the password is cracked, the photo information inside will be emptied. So I can't tell.