@Ashiku @Mod99 @TitoX Hi, do you mean you mistakenly installed TL-MR6400(APAC)_V5.3_220506 firmware on your MR6400(EU) V5.30 product? If so, please check the private message I've sent you.

@Dwells Hi, please email "support.forum@tp-link.com" with subject "Forum 598122" and provide the system log file including the issue happening process. Our engineer will continue to follow up the...

@hefseth Please check if it has manual band selection function on the product, if so, you could try to select 4G band manually to see if it would be more stable:...

@johneli Hi, the firmware version is not the latest one, you could download the latest firmware on the following website and update it manually via web interface when you are there next time:...

@TitoX Hi, may I know where you downloaded the current firmware: ‪1.4.0 0.9.1 v0001.0 Build 221123 Rel.40224n? And do you have internet access on the current firmware?

@koi2x Hi，I saw you in another new post and already replied