I have lost instructions from my Jabra BT250 and can't remember how to pair? my new phone is a htc

http://img1.jabra.com/sites/Jabra/GNimages/Products/WirelessHeadset/BT8040/Documents/UM/BT8040_UM_EM_EN_1409.pdf

Here you go

Go to this site, and it will walk you through each step to connect your particular Jabra headset with your cellphone. Choose the headset, and then at the next page, choose your phone. Moving your mouse over each step will change the picture to what you should be seeing on your phone at each step.
http://jabra.pairx.co.uk/ Pls come back and let us know if this solved your problem.

Check that both devices are BT enabled and in pairing mode -ie, leds blinking-. If one of the device is not in pairing mode, it is normal that the process fails.

If you experience the same problem on other phones with your Jabra BCE-250 -same as mine-, you might think of getting it checked first.

Go to this site, and it will walk you through each step to connect your particular Jabra headset with your cellphone. Choose the headset, and then at the next page, choose your phone. Moving your mouse over each step will change the picture to what you should be seeing on your phone at each step.
http://jabra.pairx.co.uk/ Pls come back and let us know if this solved your problem.

Every time i turned my jabra on the three beeps are in slow motion why?

You will need to pair it with your phone. first make sure the headset is off, then put the headset in pairing mode by pressing and holding the answer/end button until a solid blue light appears. then you will need to goto your cell phones bluetooth menu, turn your bluetooth on, then in your bluetooth menu you will need to add a new device or discover a new device depending on the type of cell phone you have. Your phone should find the jabra ear piece if it's in range of your cell phone and will ask if you want to pair with the device, after accepting confirm with the pin of 4 zero's.

Cannot get my Jabra BT 250v to work with my Blackberry Curve 8310. Phone indicates I am paired, but there is no audio through earpiece. You can still hear audio through phone. Help.

To make this complete: You need to turn off the headset (hold call button several seconds until it makes descending tone). Then hold button to turn on and keep holding 8 seconds more until blue light is on solid. Then initiate pairing at phone, and enter 0000 as the code.

it is 4 zeros 0000

You can download the manual from the link below: http://www.jabra.com/Sites/Jabra/na-us/pages/SupportProduct.aspx?productid=f3078775-ed17-4b07-b828-9b1157e930ce There is a good online pairing guide that will take you through the necessary steps: http://jabra.pairx.co.uk/ Please update the question & let us know if the information given was useful to you - Good Luck!