Would not pair with phone
592313
I purchased these because I bought a pair from Best Buy and absolutely loved them. Unfortunately I lost them and didn't want to pay full price for them. I received them very quickly which I was excited about but they would not pair with my iPhone 6s. I know how to work them and they should have paired within seconds of having my bluetooth on and going to my settings. I am very unhappy that this happened and have to return them and buy a pair that has not been refurbished. Also, headphones just came in plastic bags.
2481662
It paired, but never got audio. A real disappointment. Instructions were ridiculously vague. Gave up after an hour. Returned the same day.
4266699
only lasted a few months before it would no longer pair with the phone.
1170518
These would have been great and a great value if they actually worked.  Wouldn't charge - couldn't pair - completely worthless.  Returned and getting something else.
2370470
Couldn't get app to work properly on phone.  Returning.
3620312
I plugged this into my pc. It doesn't recognize it. I tried to connect this via Bluetooth to my android. It sees it, but it does not pair. I followed the instructions to hold down Home and X. It just turns off if you hold it for 5 seconds. I tried doing it less than that, it doesn't pair. I tried Home + other buttons, still the same result. I returned it but had to pay $7 shipping.
394280
Like other reviews, this came with no instructions in the box and after several attempts it did not work with my phone.  It paired but we could not hear anything from the ear piece.
1935338
I ended up returning the product because I could not get my phone to sync with the device. It worked great the first time I set it up, the device and my phone had no problems finding each other and syncing. I made a change for the next morning and could not get the phone and device to sync after that. I tried uninstalling and reinstalling the app, I followed all of the instructions, it never worked again.
4579675
Stop working with my phone and they won't pair with it. Missed my return date, so I'm stuck with them.
3543584
Unable to reliably pair with my iPhone 5c and Android phones.
693683
The problem was it would not pair with my Telsla's bluetooth. I went to suppport@xmpow.com but it was a dead URL.  I went to their website but found no useful help.  Frustrating.
4459989
Wouldn't pair with dongle. Not blaming Rio, this is the first time I got a non functional product from them. Didn't see a option to get it replaced but Amazon game me a full refund.
1040805
I cannot pair with iPhone 10. Any suggestions?
1342516
Edit: The company responded quickly with great customer service and replaced my Bluetooth FM transmitter quickly with a working device.

Original:
After many attempts, it did not pair with my iPhone 8. I will return and buy a different brand.
4571521
I was very hopeful for this speaker, but it would not connect to my phone no matter how many different ways I tried.
2468784
Spent two days trying to pair to Galaxy 8+, could not get it to work. Followed poorly written instructions that were included to no avail. Touch screen would only work intermittently.
4552464
Horrible product, pairing fails, i tried to pair the earbuds with my cellphone and first i tried by pressing the on/off button for 4 seconds and it justo says: pairing... and then it stops and turn off. Then i tried by pressing volume buttons together and it says pairing to your media device but they immediately turn off. Hope you can help me or send another earbuds.