Warning: Do not enter any wrong unlock unlock codes on your Sony Ericsson MD300 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.1. Uninstall any Sony Ericsson MD300 modem software from your PC.
2. Download, unzip and install the software from Sony Ericsson MD300 Software Page. Sony Ericsson MD300 software and installation instruction are available at
http://www.sonyericsson.com/cws/support/mobilebroadband/download/wirelessmanager/md300?cc=us&lc=en
3. Restart your computer if prompted after installing the Sony Ericsson MD300 software.
4. After your computer starts, insert your Sony Ericsson MD300 card and wait.
5. Your PC will detect a lot of different things. If your pc asks you where one of the drivers are, point it to the "Drivers" directory in the location where you unzipped the Sony Ericsson MD300.
6. Run the software you just installed, Click "OK" when it tells you the card is "Locked" then enter the Unlock code we sent.
Each Sony Ericsson MD300 mobile phone has an unique unlock code. You can buy the unique unlock code for your Sony Ericsson MD300 mobile phone at www.mobileunlocksolutions.com.