Wifi Issue 4 Laptop

All,

Cannot connect with my laptop.  Running Kubuntu 14.04 LTS on my laptop.  Problem started when a friend connected to internet via MetroPCS Hotspot on my machine.  After that could only get page saying Wifi Hotspot was not part of my Metro plan.

Was originally having connection issues.  Wrote all this up at:

https://www.linuxquestions.org/questions/showthread.php?p=5755984#post5755984

Now know I've resolved the connection issues, but something in DNS config is not right so even though ifconfig wlan0 shows me with an IP assigned, ping -c 3 www.google.com or anyother URL or IP address does not actually produce any traffic.

Needing help desperately as need to work from home via my own phone HotSpot and cannot.

Cheers!

OMR

OK running ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 78:92:9c:25:b5:d0
          inet addr:192.168.43.147  Bcast:192.168.43.255  Mask:255.255.255.0
          inet6 addr: fe80::7a92:9cff:fe25:b5d0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:72000 errors:0 dropped:1 overruns:0 frame:0
          TX packets:61562 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:78957388 (78.9 MB)  TX bytes:6383522 (6.3 MB)

I think this is a DNS config issue as running "dhclient wlan0" runs for 10 min, hangs, aborts then sets the IP to the previous default IP. I think if I know which file in the config to look at and edit this can be a simple fix but clueless myself on where to look!