I am not sure and is most certainly an odd issue as it would appear it is accepting the phone route over the default route which is what it should be doing.
Could you please type the following in an elevated command prompt on the machine (Elevated Command Prompt - Open in Windows 8) :
Once deleted please then manually add the following static route:
route delete 172.29.0.0
The commands need to be typed exactly including any spaces
route add 172.29.0.0 mask 255.255.255.0 172.29.0.1
Then try connectivity
Hope This Helps,