@muffinbubble Hi, welcome to the community. I think it is very likely your SIM carrier uses CG-NAT service and you might need to contact the SIM carrier to ask for a public IP address: CG-NAT Blocks...

@Shahab1234 Hi, welcome to the community. Did the APP time settings match the system time settings on the web UI(http://tplink.com), but not the actual time on the smartphone? What is the time...

@Groltrhin Hi, Welcome to the community. There is a workaround for your reference: On some Deco models, there is an ERP mode button on the web UI. It could temporarily disable the Wi-Fi on the Deco....

@BilalAlvi Hi, Thank you very much for your time and patience. Is your Deco X50 EU version? I have seen feedback that Samsung mobile phones could only connect to a 5GHz Wi-Fi band with a channel...

@MartijnFX Hi, do you still remember the model number of the rented Deco? For Deco M4, Its wireless specification is: AC1200 5 GHz: 867 Mbps (802.11ac) 2.4 GHz: 300 Mbps (802.11n) 300m/s is not bad...

@AJE61 Hi, welcome to the community. Did you use "PPPOE" as the internet connection type, instead of "Dynamic IP"? -You could check it under Deco APP>More>Internet connection>IPV4>Internet connection...