I found something might solve this. I this it's related to the DNS and the wifi connection. I change the DNS on my phone to the one I bought to watch Netflix, I noticed the download is faster. And so happened that I tried the download near to my router, the phone next to the router, then BOOM. All download/update finish within 10 minutes.
I try to change the DNS to auto as per router IP. The download stuck again, switch back to the purchased DNS IP, it working again. But the download slowing down when I back to my room, the router is in opposite room. I tried to test the download again near to router then download resume rocket speed.
This is really weirdo. But at least I found the way to resume high speed download although it's not convenient.