[Optimus One, P500, V Q&A, Help & Troubleshooting] dr.notor:
Headset shopping guide for lamers:

0a/ Find your phone.

0b/ Charge it before going to the shop!

0c/ Put some music on your SD card before going to the shop!

0d/ Install some music player on the phone before going to the shop!

1a/ Enter the shop (use the door).

1b/ Look around and ask for the headphones of your choice. Tell the guy that you want to test them with your phone.

1c/ Connect those to your phone via the minijack connector; or -

1d/ Pair the BT headset with your phone.

Important note:

Normal jack, DIN and other connectors are unsuitable for your phone and will not work without an adapter. Do NOT try to hammer those into the phone's minijack one!

Important note:

Do not complain about lack of minijack with bluetooth headsets. You will look like an idiot!

2a/ Open the music player and play some song you have put on SD card beforehand.

2b/ Put the headset on/in your ears.

2c/ Listen!!!

3a/ Can you hear the music? If yes, go to 4.

3b/ If not, check whether the media volume is not muted!

3c/ Volume OK and still no sound? STOP! Ask for another headset, this one will not work with your phone!

Important note:

You will look like an idiot if you do not check and go complain that the guy gave you a broken headset.

4a/ Test the media buttons. Do they ALL (in case there is more than one) work?

4b/ If yes, go to 5.

4c/ If not, STOP! Ask for another headset, this one will not work with your phone!

5a/ Make a phone call. Can the other person hear you? Can you here him/her? If yes, go to 5d and then to 6.

5b/ If not, check whether someone really picked up the call and whether the call volume is not muted!

5c/ Call connected, volume OK and still no sound? STOP! Ask for another headset, this one will not work with your phone!

5d/ Before you hang up, ask the person you called to call you back.

5e/ You get sound but cannot hang up via the headset button? STOP! Ask for another headset, this one will not work with your phone!

Important note:

You will look like an idiot if you do not check the volume and go complain that the guy in the shop gave you a broken headset.

Important note:

In case noone likes you and you do not know whom to call, you might try some emergency number as a last resort (112 in Europe, 911 in the US, for other parts of the world check beforehand.)

6a/ Wait for the call. No call? You probably pissed off the guy you called, tough luck, ask someone else. Worst case, you might bribe the guy in the shop to call you. He will probably ask for your phone number. Give it to him!

6b/ When the phone rings, try to pick up the call via the button on the headset.

6c/ Did it work? Good.

6d/ It did not work? STOP! Ask for another headset, this one will not work with your phone!

General important note:

Even if all the above worked as it should, you still should NOT buy the headphones if:

- it makes your ears hurt like hell after the 5 minutes you were testing them

- you get sound but cannot understand a word when making a call or the music sounds like Justin Bieber's "singing". (Important subnote: In case you really did put Justin Bieber MP3 on your SD card, the above is NOT a headset fault and you will look like an idiot when you complain about the bad sound. You should seek medical help in any case.)