I don't think an Android device with that much RAM would manage much multitasking.

iPhone OS actually could multitask with jailbreaking, though you quickly discovered the limitations of that amount of RAM.

This is less of an issue today (although there aren't very many jailbreaks to take advantage of it) but back then it was pretty clear the device ran with very little RAM to spare. The best tweaks were fairly simple when it came to RAM usage but true multitasking or other things that stayed resident generally had a massive hit on system performance.

Windows Phone and Symbian could.

Well, NeXTstep could multitask in 8MB of RAM. And do it well in 16MB.

I mean the concept of multitasking takes basically no overhead. The question is what resources your "average app" takes. On NeXTSTEP those requirements were quite low.