How do a pair a Motorola TX550 to a 5c iphone

If it is steady blue then it is ready to be found by your phone. If you see the headset in your phone remove the pairing and repair again. You should hold the multifunction button after turning on until it goes steady blue if you aren't getting a steady blue light in order to pair it.

Ensure that the H730 has steady blue light. Then have iPhone search for headset.

Mark
Motorola Support

hi sammieyoungj. i'm sorry to hear about your troubles with your headset. Maybe this will help your situation. Ensure the headset is fully charged. Then turn on the bluetooth feature (discoverable mode/set to look for bluetooth devices) on the phone you are planning to pair it with. Next, turn off the headset by closing the microphone boom. After about 8 to 10 seconds or you know the headset is off, press and hold the call button for about 4 to 5 seconds. The headset should activate and show a steady purplish colored light. When the light turns purple, unfold the microphone boom. If the lights stay a steady purple color, then the headset should be in pairing mode and you can revert to your phone to pair them together.
If the light does not stay steady, or turns a blue color, repeat the steps above, making sure no bluetooth devices are around that it may have paired with previously. Hope that helps. Best of luck.

I think I can help here:
Make sure your headset and phone are charged before doing anything else. The blue light on your headset will come on when it is charging, and will shut off when fully charged.
To put your headset in pairing mode, make sure it is completely off first (no blinking blue light). Then hold down the Call button for 6-10 seconds until the blue light stays on. (It will likely flash once and shut off, but keep holding until it is all the way on and stays there!)
From there, go into the settings on your Droid 2 and access the bluetooth connections. Do a new scan for your headset if you don't see it listed, pair, and connect!
http://www.motorola.com/mdirect/manuals/QG-HS820_9494A71A.pdf

Hi,to complete the look of a tech-savvy, iPhone-using individual, you must have a Bluetooth headset to accompany it. You can pair any Bluetooth headset with an iPhone. The Motorola HS850 is no exception to this. Both Motorola and Apple's Bluetooth set-up process is fast, so you'll be talking with people through your new Bluetooth on your iPhone in a matter of minutes.

Instructions

Charge the Motorola HS850 headset fully before attempting to pair. Usually, it takes two to three hours to charge the headset.

Press and hold the "Call" button (has a phone icon on it) on the headset for six to 10 seconds. The outside LED light will turn on indicating that the phone is in pairing mode.

Choose "Settings" on the iPhone homescreen.

Select "General," then "Bluetooth."

Select to turn Bluetooth on.

Wait for the phone to search for in-range devices.

Select theMotorola HS850 from the list of devices.

Enter the headset passkey to complete the pairing. By default this is "0000."

Have a nice day..

Be sure the the headset in in 'Pairing' mode.
When in pairing mode, the light should be flashing red and blue or have a steady blue.
The put most headsets in pairing mode, turn headset OFF, then hold the power button until it goes into pairing mode as discribed above.
Then you can discover it with your phone or PC. Pin (pass key) should be 0000 (4 Zeros) or try 1111, 1234, 9999

Be sure the the headset in in 'Pairing' mode.
When in pairing mode, the light should be flashing red and blue or have a steady blue.
The put most headsets in pairing mode, turn headset OFF,
then hold the power button until it goes into pairing mode as discribed above.
Then you can discover it with your phone or PC. Pin (pass key) should be 0000 (4 Zeros) or try 1111, 1234, 9999



User Manual
You can obtain a copy of your user manual by locating the FCCID on the label directly on the device,
then then going to the FCC Website - https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm
Be sure to put the first three characters in the first box and the rest (including hyphens) in the second box.

A steady blue light means it's in "pairing mode". Did you try to pair it with your phone during this time?

Charge your Supertooth one via the car charger or by attaching a usb/mini usb cable to your computer usb port. Need to charge for 4-10 hrs. Indicator light glows red (needs charging), orange (charging) or green (charged)
Power on: Press green button for 1 second. Indicator light blinks blue. A beep will be heard
Power off: Press green button for 1 second. Indicator light turns red. A beep will be heard

To pair with your mobile phone:
1. Press green button on Supertooth for 5 secs until indicator light blinks red/blue 2. Access bluetooth menu on your phone. Turn bluetooth on. Execute a bluetooth search. 3. Select ST ONE from list 4. When phone requests password enter 0000 and press OK 5. The handsfree kit is now ready for use 6. Clip Supertooth on sun visor of your car so that the microphone and control buttons are directed towards you. 
To make a call: Dial number on phone. Supertooth will automatically connect. Indicator light is steady blue during call
To end a call: Press red button for 1 second
To answer a call: Press green button for 1 second. The bluetooth indicator will turn a steady blue.
To increase/decrease volume. Press volume buttons repeatedly up or down. They are situated between red and green buttons.
Hope this helps.

If you turned it on and it was steady blue most likely you held the call button too long. The steady blue means it's ready to pair with a phone. Try repairing again and if you still don't hear anything, play with the volume buttons to the top and buttom of the headset the volume may be down. If that doesn't help I don't know what will.