adb got two same serial numbers when connected to two smart phones

Question

I have two smart phones (ZTEV788d, system Android 2.3.6) connected to a computer (Ubuntu 11.10) at the same time, using co

Answer 1

if your device is rooted try this way
to change serial number your devices , first connect one of them to your pc then type this in cmd

adb devices

this shows your device id (serial number).

List of devices attached
P753A12D    device

pick some new name ,for example NAME1
then type this commands

adb shell
su 
device_name="NEW_NAME"
cd /sys/class/android_usb/android0/
echo -n $device_name > iSerial
cat iSerial

exit exit from root
exit exit from shell

START
now unplug the usb cable and run this commands

adb kill-server

connect your device again and type

adb devices

now you can see changes

List of devices attached
New_NAME    device

END

note : if it did not work first time
disconnect your phone and do this parts of my guide from START to END again.