Hi,
my device is also suffering with the security issue already reported by others: my car's (Volvo V90) media center (Sensus) can not connect to the mifi as it detects it as an unsecured connection (probably due to the fact that wpa and wpa2 both available as the authentication method). 

I saw in the forum that for hw version 7 and 6.2 there are beta fw available for m7350 solving this very same issue, but unfortunately these beta fws can not be used for my device (due to different hw version). - the other thread --> https://community.tp-link.com/en/home/forum/topic/559264?replyId=1107082

Could you pls help me out with the appropriate beta for hw v5 having the wpa2 only option in the wifi settings?

Many thx!!!!