I know this is referring to programming, but I went overseas to study for two months this year with only my Galaxy Nexus, so this is my experience:<p>Yep, to a limited extent you CAN live with only a phone (and be quite productive!). Expect to use a physical notepad a lot too though, as flipping between apps even on Android 4.1 constantly is no fun when you need to keep referring to information.<p>Battery life is a KILLER. I get a whole day out of my Galaxy Nexus back home, but when using it exclusively as my only technology, it lasted me half a day max. 8am to 1pm if I'm lucky.