From this post you'll realize that how to havk down your neighbor wifi router with your android smartphone. Well there is no apps to hack down probably i thought to post the article yesterday but unfortunately i was slept earlier than usual. :*)
Ok let's hack but limited devices only im sorry to say this. Only broadcom wifi chipsets could get the monitor mode to take down.
If you check out this blog would be better.
Current status is Samsung galaxy S2 and Nexus one .
THIS IS FOR CYANOGEN 7 AND NEXUS 1
First of all download this file, unzip and extract to the sd card or internal storage
Now run "sh setup.sh" on some terminal or else use any other terminal apps
Now you have a wifi interfacr named as eth0 in monitor mode.
Now run "iwconfig eth0", check out the following output
eth0 IEEE 802.11-DS
Frequency:2.412 GHz Access
Bit Rate:72 Mb/s
Retry min limit:7
RTS thr:off Fragment thr:off
Signal level=0 dBm Noise
Rx invalid nwid:0
Rx invalid crypt:0 Rx
retries:0 Invalid misc:0
You done.. XD thanks bcmon.
Check out here for Galaxy S2