Yes but it's little pointless. From phone you can get better connection with these headphones then from SR15. For Bluetooth it's just a transport.
My phone is an iPhone 6s Plus. 128gb.
I have about 500gb of 16 and 24bit flacs on my SR15 with Tidal hi res too. I don’t really want my phone involved. I know the Sr15 and Sony XM3s do AptX HD. I don’t want any wires. Sorry I’m new to most of this.