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

1. Is that normal that two phones to have the same serial number?

The purpose of the serial number is to uniquely identify the device, so they should be different. That being said, some manufacturers don't bother. It's also possible that the firmware is reporting the number incorrectly.

https://stackoverflow.com/questions/4636794/strange-output-of-adb-devices?rq=1

You can check the serial number on the actual devices, and see if it matches what adb is reporting.

Settings > About Device > Phone Identity > Device Serial Number

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2. Can I change the serial number? if yes, how?

There isn't an easy or consistent method for doing this that I'm aware of. Here are some examples where others have accomplished this feat (but I have not):

xda-developers.com - Change Wifi , BT , IMEI , Serial Number of any mtk android phone

hugestreet.info - How To Change IMEI, Device ID of Any Android Device

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3. Is there any way to run these install, push commands successfully even if the serial numbers are the same?

There shouldn't be any problem running commands if only one device is connected at a time.