Here is the original question that i have raised at Samsung Galaxy 3gt-i5801 is not being detecting in my pc.
Actually, Initially when i have purchased this phone, at that time i was developing applications and successful to run the applications on my phone. But after few days, phone is not being detecting by my pc. I have also purchased new cable as i doubted the data cable that it may be damaged so.
After been long time Searching for a solution and tried a lot, i found a solution to Repair Samsung Phone’s USB connection.
1. Unplug the USB cable
2. On the cell phone, dial the following number: *#7284# Once the last # is hit, the PhoneUtil application is launched. Choose USB -> Modem and then USB -> PDA mode. The good mode should be PDA. Even if the mode is PDA, switch to Modem and then back to PDA.
3. Plug the USB cable.
Note:
This is not only for Samsung Galaxy 3 – Android phone, but it is also used to “Repair USB connection for any Samsung Anroid phone”
Update:
After received the Froyo update on my mobile GT-i5801, i have never received this issue yet. so this may be a issue till the Android 2.1 version.