Half-truths about airline wifi on T-Mobile website

According to T-Mobile’s website:  “We partner with Intelsat, Viasat, Thales and Panasonic to give free in-flight Wi-Fi on Alaska Airlines, United Airlines, American Airlines, and select Delta Air Lines flights.”

The thing is that these are at most half-truths.  We have flown on 7 flights recently, 4 domestic and 3 int'l.  Most recently, we flew 5 flights, all on American.  All flights had wifi - NONE had the T-Mobile listed.  Why?  Because they all use Panasonic Avionics for wifi.  So I asked American why they didn't offer the T-Mobile promotion.  This was their response: 
“Thank you for contacting Panasonic Avionics in regards to your in-flight Wi-Fi experience on board your recent American Airlines flight.  T-Mobile has partnered with Gogo to provide free Wi-Fi and texting in-flight. Unfortunately, this is not an available offering on board Panasonic's equipped aircraft at this time.”

Somebody is lying.