Almost impossible to use with Bluetooth headphones if watch is on the left wrist. BT headphones have the receiver/antenna on the right side (AFAIK). Connections drops the minute left arms gets near the hip/waist or below. Tried with Bose, Plantronics and others.
My dead (waiting for new battery) Gear S2 maintained connection when worn on the left wrist without problem so this is a bit of a downer.
YMMV
(I plan to do a full review of the watch asap)
Every watch i have run with has had the same problem witb bt . Watch on left wrist . Single bt earbud in right ear only . Crackling when listening to music due to poor by connection . Recently tested Kospet Hope and same results . Please note the earbud has always been a very cheap ebay option ( not apple etc ) . I will test Lem10 later .
There is this ongoing list which lists headphone connection reliability. I may try one of those that works when watch is worn on the left wrist.
Thanks.
Jabra Elite Active 45e hold pretty solid connection so far when watch is on the left hand. Starts cutting out when hand is moved from the side and towards the back. Connection is less solid when watch is on the right. Starts cutting out sooner when hand is moved from the side and towards the back. Have not tested outside.
Think it is a keeper for me unless something changes. Has a voice assistant(siri,alexa,google assistant) button on the left ear piece. Wonder if I can reassign it for some other use. Tips are not adjustable so comfort can be an issue. Hooks are a bit adjustable though. Has an app that allows for customization.
So it looks like any of the newer Jabras would hold connection on the left hand.
Tested out Sony WH-1000XM3. Holds solid connection on the left hand as well. Did not test on the right hand. So newer Sony headphones probably would be good too.
Spoke too soon. The Jabra is not usable outside with this watch. It seem to have receiver on the left side too. (cuts out badly when watch is on the right hand). Works if the left hand is raised above the hip but otherwise when just walking and swinging the hand, it cuts out non stop.So have to walk with arms in front of the hip.
No such problem when the headphone is paired/connected to my Note 9. No matter where the phone is the headphone connects with no issue.
This tells me the BT on the watch is flaky for headphones at least as far as my device is concerned.
Tried out Plantronics Backbeat Fit 2100. Fares better on the right hand compared to the Jabra. Won’t work on the left hand.
This headphone also has no connection/cutting out problems when connected to Note 9 no matter where the phone is placed both inside the house and out in the open.
@george @Dr_Andy_Vishnu I use ear buds, true wireless BT ones and with LEM10 the connection is very strong . with zeblaze thor pro it’s much worse
edit: tested with all my 10 BT headphones, buds and headsets and all have a strong connection, how strange
Watch is worn on which hand? Any difference wearing inside vs. out in the open field/ground?
Jabra connects good inside but out in the open it is very bad from my test.
Apparently BT needs a surface to bounce off which probably explains solid connection inside.
(May be I have a faulty watch too)
I tried left wrist, and made sure receiver was on right ear. Maybe tighten screws on the back will improve signal?
Good idea, gotta try that and see how it goes.
Thats what i have been using mate 
Has anyone found a good solution for it instead of wearing the watch on right wrist ?
Facing crackling sound in-between.
Is the problem in stock rom itself ?
Thanks
What is meant by tighten screws ?
How it helped ?
Regards
No I think it’s a “problem” with the placement of the Bluetooth transmitter/receiver.
But its not a problem with watchdroid…
Could be a firmware problem.
Screws that holds everything together at the back should be tight. That’s part of their antennae
Also if the right earbud is so slim that it almost disappears in the ear then you’ll have the audio drops.
Ifyou are unlucky.
I think the problem comes from a combo of hardware, antenna placement, firmware and Bluetooth signal strength. Tested it with BT speakers and multiple quality headsets (check my posts and the video). There may be a bad batch of these watches since some folks have no issues. It is not just Bluetooth. There is touch screen problem, heart rate monitor and speaker volume issue as well. So overall quality problem. Hopefully firmware update will fix it.
Be careful opening the back cover. Screws comes off fairly easily but the back cover is held tight and there is a thin flat cable going from the main board to the heart rate monitor attached to the back plate. It might snap if back plate is pulled back abruptly.
BTW, how do we know that the screws are part of the antenna? Is it common on smartwatches and phones that screws are part of the antennae? Honest question.
because screws goes into the metallic part of the watch, and that’s the only material usable for antenna. if there’s a small gap, the strength of BT may then vary.
