Really? I didn't know you could do that and that's a very specialised use case. Every phone I've ever had disconnects you from the wifi network as soon as you enable a personal hotspot.
Still, it's not what the OP is trying to do, I would imagine.
EDIT: Do you connect your laptop to your phone via USB or Bluetooth perhaps?
I am reliably informed that creating a wifi hotspot, whilst connected to another wifi, is impossible, which to be honest is what I had thought. This is what Asus have to say (there are many such quotes):
"Wifi and hotspot can't be used at the same time because one wireless card is only capable of working in one mode at a time. It can be either in Master mode (Access Point or Hotspot mode) or in slave mode (Connecting to some other WiFisource). To do both things at a time, you need two wireless cards."