@TP-Link Yes I have. The firmware upgrade is not working: Error code: 4503 The uploaded file was not accepted. Could this be because I have hardware version v2?

I cannot receive SMS messages, what can I do to fix this? Sending is no problem, here is the log: ID Time Type Level Log Content 1 2021-09-19 11:07:02 4G Information USER: Send a sms successfully. 2...