I have a motorola H721 and i'm trying to pair it to my new phone but I lost the pairing code can you help me

Maybe it is not compatible with iPhone.
Buy a new one.

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Go into the phone and remove the H721 from the bluetooth choices (if it's there.) Turn your phone OFF, then back ON. Then try to pair them again.

Open the boom flip on your headset. Once open, press and hold both volume buttons and the call button on Motorola H721 for more than 10 seconds. The indicator light will flash blue three(3) times and then become steadily lit. The headset is now in pairing mode.

Press and hold both volume keys and the call key on your headset for some 10 seconds, until the indicator led lights steady blue. This will clear all pairing informations stored on it
Your headset works like this: if it is turned on, and doesn't find a paired device within its range, it enters pairing mode again. So, once it is paired, e.g. to your phone, make sure the phone's bluetooth radio is on, prior to turning the headset on.
Hope it's the kind of informations you were looking for.
Cheers! Carlos

Hi,
If you never set a passkey for the Bluetooth it should be 0000 or however many digits it is. I'm not exactly sure0.
Please refer back to me for further help if needed. Thanks!

From the Motorola Website:

The default pin code or passkey for Motorola Bluetooth accessories products is 0000 and cannot be changed.

This should work for you, but if it doesn't you'll to contact Motorola

open the boom flip. Press and hold both volume buttons and the call button for more than 10 seconds. The indicator light flashes 3 times and then becomes steady lit. The headset is now in pairing mode.

I actually have both products, and I was able to get my bluetooth to work with 2 phones. All you have to do is first pair your phone with the H721. Then in the phones functions, turn off the bluetooth so it is no longer in discovery or connected...but do not turn off the bluetooth itself, just in the phones settings. Then go to the bluetooth settings in the iphone. you should see the H721 in discovery but not connected. Before connecting it you must put the H721 into discovery mode as well. Hold all three buttons down for 19 sec. it will go solid blue. then push connect on your iphone. onces connected, go to the original phone and turn the setting back on for bluetooth connection. both are now connected. Only one may apear to be connected, but both are. test it with another phone. call each number and you will see that you can now answer both calls with one device. If the iphone is connected and phone 1 rings...the H721 disconnects temporarily from the iphone and connects to the other device to answer it. Hope this helps. Cause thats how I got mine to work.

Press the all-in-one button for about 8 seconds until the light is constantly on, this puts it in pairing mode. then go to your device and initiate pairing. the device code is 0000.

When done the blue light should shut down, and your all set.

Hi, follow the steps to get your product paired. Step A - PUT HEADSET IN PAIRING MODE Note: To turn off headset With the headset power off, press and hold the Call button for 6 to 10 seconds until the blue indicator light turns on and remains steadily lit. (The light will flash while you hold the Call button.) If the indicator light is flashing or does not remain steadily lit, turn off the headset and repeat step above. Step B - SET THE PHONE TO LOOK FOR YOUR HEADSET Select (Menu) > Settings > Connection > Bluetooth Link > Handsfree > Look for Devices. The phone lists all Bluetooth devices it finds. Select Motorola H350. Press OK or Yes to pair (link) the handsfree device. Enter the passkey 0000 and press OK. Note: Passkey cannot be changed from 0000. When your headset is successfully paired with your phone, the blue indicator light changes from steadily lit to flashing. additional help http://www.motorola.com/mdirect/manuals/QG-H300_9495A08A.pdf all the best sreejith 2 Step A - PUT HEADSET IN PAIRING MODE Note: To turn off headset