Bluetooth problem at Garmin Forerunner 630

Hello everyone,
I just got a very special watch Garmin Forerunner 630 and i started to set it up.After some attempts to find every feature of this device i tried to resume to initial settings.For that i restored all the settings that were done till that moment.
After this moment , i could not find how to activate the bluetooth and this is the reason that i can't synchronize the watch with mai phone.
Please, can you help me with a solution to resolve this thing?I can't stand to have this device and not to benefit by all it's features..:(
Thank you in advance for your kindness!