Brittany P. August 15, 2018 20:23 Updated The Easy One Touch Car Mount can hold devices up to 3.5 inches in width, which includes an iPhone 5S. Related articles Will the Easy One Touch 4 Series hold the iPhone 5S? What is the maximum width of a smartphone that an iOttie Easy One Touch Mount can hold? What material are the side arms that that hold onto your phone? Will it damage or scratch it? What is the iOttie Easy One Touch Lock & Release feature? Comments 0 comments Article is closed for comments.