@SilverFang Understood, hope local team can reproduce the issue in the lab.

@Sir_Robot Good day, Huawei E8372H-820 Dongle has not been tested with TD-W9970, you could plug in the USB Modem and turn modem into 3G/4G Router Mode and see if the dongle can be detected or not. If...

@PainApple Hello, Here is troubleshooting FAQ for Port Forwarding, please try suggestions mentioned here: ( delete virtual server items before trying DMZ) https://www.tp-link.com/support/faq/785/ If...

@Milad1993xx Hello, I'm afraid the exact chipset model is not open to customers but here are some other information that may help: VR400 V3 uses a different chipset from V2 ,and here are the main...

@adr1n Hi, may I have the model number of the older AC1200 router? Which channel did you choose on it, and the Xiaomi phones can connect? Can we have the Xiaomi phones' models also?

@Zagreb Glad to know you resolved the issue, you may share with the community how did you resolve it, which will help a lot, thanks.