@Kevin_Z I returned the TP_Link and replaced it with a Netgear Unit. Identical setup and no issues for 48 hours with the Netgear.

Over the last few days my wifi-clients would lose Internet connection. It appears to be connected wifi but no internet. Upon further investigation, the error on my phone is unable to get IP address....

@Kevin_Z I'm in the same situation and again Tech support offered a hardware replacement. I really do not think its hardware. Its dropping the internet connection. My phone appears to be connected...