I have a dual sim Xiaomi Note 3 which works very well at but gets very hot. We had to change the battery because the last one was swelling before i started using this as a GPS.
My other phone is Asus Zenfone Max Z010D which remains very cool in similar situations. But the second sim is only 2G and the GPS fails to work from some time now.
The other option is to hold the phone over an AC vent but it is slightly awkward in my car. It would take it out of my direct sight.
What are your recommendations to use as a cooler running GPS?
EDIT:
I do know that the dedicated GPS devices are more sturdy but I am looking only for a mobile based suggestion now. And that too below 250 AUD and with DUAL sim.
EDIT2:
I bought a ZTE Boost 4" Zume 5 Mobile Phone $29 @ Coles https://www.ozbargain.com.au/node/371113.
I am still waiting for it to get unlocked but as per the initial tests, the GPS lock is super fast and screen very cool.
Buying a actual GPS?