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Hello,
When we are using USSD tp-link lte network switching to 3g and not back to 4g until we reboot the router.
Any advice please.
Regards,
Haval
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Hi, USSD function is working on 3G/2G network only, so it is normal that the router falls back to 3G when you use USSD function.
Normally when you stop using the USSD function, it will switch back to 4G LTE network, so please do make sure the USSD commands has been stopped, and you could also go to Status page and refresh it, if it still works on 3G network only, please wait for about 5 minutes, then save a system log file on Advanced->System Tools->System Log page.
In addition, may I know who your ISP is? and please also double-check the hardware version of your MR6400 on its bottom label, is it V5.0, V5.20 or V5.30?
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Hello,
TL-MR6400 v5.3
Provider: Zain
Test with another two providers same issue only after reboot will back to 4g.
Regards,
Haval
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Hi, we would like to escalate your case to the support engineers, and they will help follow it up, if you are willing to do further analysis, please check your inbox and respond.
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Hi, may I know if the issue still exists? If so, please kindly check your email from our support engineer and respond.
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