@camp_ben Same issue with my network. Once a client stops using the mobile device, it disconnects from the wifi. They need to RE-ENTER again the access code. Looking forward for the expert to share...

@Clive_A I fully understand what you said earlier. Got another PC again today, plugged a network cable directly from modem to this PC and set the NIC to Obtain an IP address automatically. No wifi...

@Clive_A No problem with my ISP. My internet cafe is working fine. Only that, it does not have Router. That is why I want this router on my network. Already tried to clone some of my PCs MAC Address...

@d0ugmac1 I am not using PPPoE. My connection is Dynamic and no login credentials. Yes a PC / Laptop directly connected to modem get an IP like it should

@Clive_A ISP is online and done all the recommended solutions BUT still didn't fixed the issue. Any other possible Solutions?

Can not acquire IP Address from modem. Don't have internet. My connection is dynamic