shardey is right here .. you've gotten confused. Qualcomm makes the communication systems, i.e. the component that communicates with the cell towers, the part that makes a phone a phone.
The A5 is a system on a chip (SoC) containing the processor, the graphics system, the system memory, etc.
They are physically distinct components.
i read wrong, i fixed it lol. i originally thought they said qualcomm for cpu not the chipset, my bad
EDIT: i think the guy shardey posted from made the same mistake i did