I'm actually guessing its more of a security issue.Juice said:Memory has NOTHING to do with the rule. The iPhone is built on OS X with as much memory as many machines that were built for OS X around its debut. iPhone can multitask just fine.
All it has to do with is bandwidth. Bandwidth in that, background applications that require network access will stack up, and having 30 applications in the background using EDGE consistently would cripple AT&T's margins.