Question [Q] [Ubuntu] adb does not recognize device

Hello everyone,

I have a short question which you might be able to answer (at least I hope so).

I just got a cheap Android phone on which I want to learn to do some Android app development. So, I want to use the "adb" tool on Ubuntu to push my app to the device.

First of all, I wanted to find out which vendor is the right one (as the phone itself does not have branding), so I ran "lsusb". The output was

Bus 001 Device 010: ID 1782:5d01 Spreadtrum Communications Inc.
Thus I figured that "1782" is the vendor ID and I created an udev-rule named "51-android.rules" which contains

"SUBSYSTEM=="usb", ATTR{idVendor}=="1782", MODE="0666"
I set file permissions with

chmod a+r /etc/udev/rules.d/51-android.rules
and restarted the udev service aswell as the adb server. But still the output of "adb devices" does not show any connected devices. What am I doing wrong?

I am running Ubuntu 13.04 with Kernel 3.8.0-34. USb debugging on the phone is enabled.

Any help would be highly appreciated,