> Ideally the phone would handle this in a smarter way, e.g., by monitoring the strength of both the wifi and data signals and switching to whichever is likely

> Ideally the phone would handle this in a smarter way, e.g., by monitoring the strength of both the wifi and data signals and switching to whichever is likely to have the least packet loss The tradeoff here of course is battery life. The phone OS doesn't want to switch on a second radio until absolutely necessary for obvious reasons.