Hear from other runners about FlipBelt and the reason to distribute the weight evenly on both sides, which menas the options of armband and shorts with phone pockets are out for long runs.
But if it is a quick run, then an armband is ok.
iPhone X Armband, Armband iPhone X | Armband iPhone 10 - BFSPORT Water Resistant Sports Running Arm Band with Key Holder for iphone X/10/7 plus/6s plus/8 plus
Sweatproof Running Armband with Touch Sensor & Fingerprint Unlock & Earphone Access & Key Holder & Reflective Band for iPhone 8/8plus/7/6S/6 Plus and Most Other Phone Models Up To 5.5”
