wireless phone/base recommendations

I'm looking for a for a simple, bare-bones phone and base that can work with a wireless network (T-Mobile) and GoTo, so I'm guessing I need a cordless VoIP phone that supports Wi-Fi connectivity. What phone/base combo/specs would you recommend? The AI response was this:

"Please ensure that any phone you consider is compatible with GoTo Connect services":
yealink w60p cordless dect ip phone and base station
yealink W56H cordless dect ip phone and base station

Your help much appreciated.