Accessory unsupported for Xperia Arc S

[grahammb1]

I bought a replacement MH650 headset for use with my Xperia Arc S phone.  Upon attempting to use it, I get an error message: 'Accessory not supported'.  My previous headset was the same, I replaced it only because I lost it, so I can't understand where the problem lies.  Please can you help?

Thanks very much.

[Uliwooly]

the Xperia Arc (2010 and 2011) use OMTP standard, 2012, 2013, 2014 CTIA standard 

[grahammb1]

Thanks, I'm afraid that I don't really understand whether that answers my question.  My headset doesn't work with the device that it's designed for.  Do you have any suggestions about what I can do to fix this issue?

[Uliwooly]

Now that's quite odd, you might want to take them back to the store

[Rickard]

If you look at the label on the headset, does it say MH650 or MH650c?

[grahammb1]

 Thanks for responding.  It says MH650, as I stated originally. I'd checked some f the previous posts about the difference before I posted my query.  Any ideas please?  I'd really appreciate it.

[Rickard · Accepted solution]

Then it should work so there's something wrong with the headset or phone. As uliwooly suggested i would recommend that you contact the store to try another headset.