I just ran with it the first time and all is fine and dandy but I was wondering if I constantly run with it will the sweat from my hand ruin the phone? (I do have a case on it, it's this one http://www.amazon.com/CellJoy%C2%AE-Protective-Stealth-Protection-Packaged/dp/B00KIX4NDE/ref=sr_1_1?ie=UTF8&qid=1406414509&sr=8-1&keywords=celljoy+nokia+520 But I haven't put a screen protector on it yet.)
Read more: Ran with my new Lumia 520, will palm sweat ruin the phone?