[Samsung Gear S] _Dejan_:
I will try explain what Im do to get working Gear Manager with modified build.prop file.... You NEED rooted device!!!

First Im mess with a lot of different versions of Gear Manager and Samsung apps and finaly decide to uninstall all and start from begining... Before Im uninstall all Gear&Samsusng apps Im clear data in each of them, unpair Gear S device in BT settings and Im also clear dalvik-cache by deleting everything in dalvik-cache folder and reboot device. also you need to put your Gear S to default state(welcome screen)...

Then Im do next:

1.) Edit build.prop file to:

ro.product.manufacturer=Samsung
ro.product.model=SM-G900F
ro.product.brand=Samsung

2.) REBOOT phone.

3.) Im download Gear Manager version 2.2.14100299 (Size 159MB) from THIS THREAD. Extract files and copy them to right folders in device - Like they are in zip file(to do this you need file explorer with root access Im use ES file Explorer):

root/data/app

root/system/app

root/system/priv-app

4.) REBOOT phone and after reboot wait that phone complete updating apps... If you get some crash report for S Voice or some other App just diismiss it...

5.) Login to Samsung account(If you don't have it create it and activate it). You must see it in phone Settings under Accounts...

6.) Open GALAXY Apps (Store) and it will ask you to make updates if you want continue... Update it and it will also install/update some additional samsung services... Do not update Gear Manager.

7.)Open Gear Manager and try connect Gear S to your phone. It will probably fail to do this. then disable BT to stop HostManager crashing.

8.) Edit your build.prop file and set "ro.product.manufacturer" and "ro.product.brand" to your DEFAULT one. for example my on sony Z1 looks like this:

ro.product.manufacturer=Sony
ro.product.model=SM-G900F
ro.product.brand=Sony

9.) REBOOT phone.

10.) Test if your GALAXY Apps (Store) still work and find apps.

11.) Open Gear Manager and connect to your Gear S device. It should now normaly connect and install all aps to watch...

12.) Enable notifications in Gear Manager and also on your Android settings...

13.) You can get list of avalible apps for your Gear by pressing "get more apps" on your Gear S and it will open you Gear Store on your phone. Installing apps from store still doesn't work and you must do this manualy. You can press install button on market and it will download app(.wgt file) to:

/data/data/com.sec.android.app.samsungapps/files

Just copy this .wgt file to your PC and install it by using sdb command(you need instal Samsung Tizen SDK):

sdb install YOURFILE.wgt

Also to download next app you need stop GALAXY Apps from settings and do step 13. again...

If someone know fix for direct installing apps please post it...

Calendar&Email app do not work.

Tested with Sony Z1 running stock 4.4.4(Only rooted) 14.4.A.0.157 and Gear S with R750XXU1BNJ7 firmware.

List of installed samsung apps with versions:

GALAXY Apps 14093005.02.008.1
Gear Plugin 2.2.14100299
GearModule 2.2.141.00299
goproviders 2.0.309
HealthService 1.3.331
HostManager 2.2.141.00299
Samsung Billing 2.01.16
FOTA provider 2.140442.2011
Account Samsung Account 2.1.0010
Samsung Accessory Service 2.15.83
Samsung Gear 2.2.141.00299
Samsung In-app Purchase 3.00.04
Samsung Push service 1.3.0.2
saproviders 2.0.309
SASystemProviders 2.3.23

I hope that this will help someone to get work it on non samsung phone. Also Im translate some apps names(Samsung Billing, FOTA provider, Account Samsung Account) from my local language to english and Im not shure if they are valid....