Android and Ubuntu Mobile have no overlap in the machines they're targetted at. Android is for phones. Ubuntu mobile is targetted at Intel MIDs with 512MB of RAM or more. Also, IIRC, AGPS doesn't necessarily need a data connection. Even if it needed a data connection, unlimited data connections over GSM aren't that expensive in many countries. In the US it tends to be somewhere between $20 - $30 per month.