LTE4506 frequent disconnections

Paco83

Hello, I recently got an LTE 4506 router with a 4G sim card. Everything works perfectly, except that I have to restart the router several times a day because I can no longer access the Internet. It says the connection is established, I can do a Google search, but can't access websites. On the router interface page, the settings seem ok (4G mode, always-on connected...). Can you help me? I've seen two other topics on this problem, but neither solves it.

Attached is the log when I lost the connection.

log.txt