I found i way to sideload all apks

first you can use "SideloadVR" app google apk and download it, you have a lot of apps to try there, but first you need to make "OSIG" file specific for your device on oculus site you must login with any account (even give number for developer) and go to OSIG generator link google it and there with your ID (you can find in sideloadVR app your id) you then generate OSIG file and download it (be sure it is on phone download folder because sideloadVR only detects osig in that folder) and then you can easily use almost any app that is listed in sideloadVR... for specific app you want to use you can make almost any apk on computer ready for your device with "Add OSIG" google it have tutorial too i managed to make "samsung internet" apk signed with my osig file and app its working in phone normally and i can browse and watch youtube in vr now

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One more thing... to prevent oculus "update avaiable first screen" when you connect your device to gear vr... use some app disabler i use "FreezeYou!" to disable "Gear VR System" service and no more first screen update... you just need to manually now launch vr app you want and then connect it to gear...