Do you have TP-Link Tether and Kasa APP on your iphone？I wish you can try if your TP-Link ID can login in by Tether and Kasa APP on LTE network.

Can you provide your TP-Link ID for us? We will check this issue smejicoiii wrote Ok installed DNS Lookup app on my iPhone and over LTE wap-gw.tplinkcloud.com Was able to be resolved.

Does it happen all the time that APP cannot login on LTE and prompt "Failed to connect to TP-Link cloud please check your wi-fi or mobile data connection"? You can goto WLAN>APPs Using WLAN &...

Do you have a DNS lookup APP on your iphone? if you have one, try to lookup "wap-gw.tplinkcloud.com" over LTE, check if it can be resolved. "wap-gw.tplinkcloud.com" is the DNS of cloud server for our...