I sent test text to Garmin. Worked. I send messages too two different people. They received and responded. I never received even though checked messages many times. Upon return to cell coverage, those responses were in my. cell phone regular text inbox. Late Saturday (other problems were 6/4, 6/5 Fri Sat), I finally received one response of the 5 sent, the latest (Sat night). This wrecked an otherwise great trip. What possibly happened? System down for that time?