How to change the (permanent) MAC address on my android phone? In the past months, I've got 2 Chinese Android cells (Froyo) based on MTK6515. They work fine but we started having lot of trouble attempting access to internet, and after a while I found out that both phones they have the same MAC address, which causes connection problems. So, I'm looking for a procedure that could change the devices' MAC addresses and solve our trouble.

I found a method which involves changing the file at /etc/wl/NVRAM.TXT, but after referencing a couple posts around the webs, it turns out my phones do not have this folder (and thus the other files inside). Any clue?

Please don't tell me a pray about that MAC addresses are burned into a chip, at least not in these devices, because I've already lost their IMEI's too (by hard reset), but I've recovered them and they're functional now.
I found a tutorial on MAC address spoofing at XDA that might be helpful:


  REQUIREMENTS
  
  1) ROOTED PHONE 2) BUSYBOX INSTALLED 3) Terminal App
  
  OPEN UP TERMINAL AND WRITE
  
  :su :busybox iplink show eth0
  
  (THIS WILL SHOW YOUR CURRENT MAC ADDRESS)
  
  NOW TYPE IN
  
  :busybox ifconfig eth0 hw ether 00:11:22:33:44:55
  
  (INSTEAD OF 00:11:22:33:44:55, YOU CAN WRITE YOUR WANTED ADDRESS)
  
  CONGRATULATION, YOU HAVE SUCCESSFULLY SPOOFED YOUR MAC ADDRESS!
  
  YOU CAN CHECK YOUR MAC ADDRESS BY TYPING
  
  :busybox iplink show eth0


I don't think this is permanent however.  I did find another guide on Android Forums that seems to be permanent:


  After your rooted head into terminal emulation type su and go into
  /data/misc/wifi
  
  Look for a file called nvram.txt
  
  Copy it to your sdcard and then to your cpu desktop open it with
  notepad and at the bottom of nvram.txt is the mac address
  
  This i was able to verify and test on android Citrus Ciena
  
  Edit that mac address and save it as nvram1.txt onto sdcard
  
  Now go back to data wifi misc and copy nvram.txt to nvram.bak
  
  Head into gui and then settings then wifi then turn on the wifi but
  don't connect to any wifi
  
  turn off the wifi,switch back to terminal
  
  Copy the nvram1.txt to data misc wifi
  
  remove the original (make sure you got it backed up)
  
  Rename nvram1.txt to nvram.txt
  
  head back into gui and then settings then wifi
  
  Now for me it immediately stated unable to turn on wifi
  
  Ignore it and try to turn it on anyways
  
  When it turns on your newly edited mac address will take effect
  
  Connect to your AP
  
  NOW B4 REBOOTING YOU MUST CHANGE NVRAM BACK TO THE ORIGINAL!