Did a search. Today i opted for a gogo daily mobile purchase on an AS flight to SEA. $10. The T & C stated that it would be good on any gogo equipped flight today. Then on an AA flight to DFW. Could not log on. Chat with the gogo operator gave me a promo code and I noted changing carriers was not mentioned in the rules. Be aware.

Second issue- I have an original Gtab 7 Sprint off contract and a Nexus 7. I could get the G tab online with the mobile day pass and my phone, but not the nexus 7. The chat operator said only "phones" were allowed on the mobile pass. She said tablets were considered laptops and did not qualify for the mobile pass. So I am guessing my stock 7" g tab sprint off contract is seen as a phone to the network. I wonder what other tabs with a cellular chipset can do that? As a data point, the mobile day option was available on my phone and gtab, but not the nexus 7.