for distance riding I wear a Camelbak and carry the cell phone in that. Since I live in a state with really bad thorns, I run Slime'd tubes in my tires so I only carry a spare tube on long rides and I carry that in my Camelbak also. For short rides I've carried my cell phone/garage door opener in my jersey pockets before and they were fine. You can also get another pack - one of the triangle ones that fit under your top tube to carry the rest of your gear in. I just upgraded my seat pack for one that was a tad bigger and it will now fit 2 CO2 cartridges, the cartridge case, both sets of tools and tire tools, cell phone and opener, plus has a strap on it for a blinkie. I really like that much better!