Page 10 of the manual doesn't list support for phones, and the product price point at under $200 is well below the level of a unit which would offer any sort of advanced features. The back of your HTiB kit has a pair of auxiliary input jacks, page 12 of your manual, item #4. Just get the headphone breakout cable and plug it into the aux. input jack and be done with it. Just a few bucks and you are done.
http://downloadcenter.samsung.com/content/UM/201201/20120119162224331/HT-E550-ZA-ENG-0118.pdf Wow, reading further... Page 19 of the manual shows a 1/8" (3.5mm) stereo input jack right on the front of the HTiB. Just get a 1/8" to 1/8" stereo jack and plug it into your phone and HTiB and you are setup that way and can remove the cable at any point. Very reliable and ensures functionality.