back key

[proble]

   how to install / update the device software update in sony xperia m. so. kindly tell me procedure for that.

 what is back key

[proble]

   how to install / update the device software update in sony xperia m. so. kindly tell me procedure for that.

[samkkr]

use pc companion or sony update service to update software it will give u instructions how to, back key is the illuminated key on thebbottom of ur phone which is used to back