User Agent

Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; Lumia 535) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537

This user agent belongs to IEMobile. Microsoft Corporation developed this Browser. This Browser run on WinPhone8.1 and it renders web contents with Trident on general Mobile Phone.

Browser - IEMobile

IEMobile

Version11.0 @ 32 bit
DeveloperMicrosoft Corporation
ParentIEMobile 11.0
Device TypeMobile Phone

Act as 

Crawler No
Fake No
Anonymized No

Device - Microsoft

BrandMicrosoft
ModelLumia 535
Platform windows 8.1 (32 bit) by Microsoft Corporation
Mobile Yes
Tablet No

Capabilities

Rendering EngineTrident by Microsoft Corporation (For Internet Explorer since version 4.0 and embedded WebBrowser controls (such as Internet Explorer shells, Maxthon and some media players).)
Pointingtouchscreen
Javascript Yes
CSS Yes Version: 3
Cookies Yes
Tables Yes
Frames Yes
IFrames Yes
Background Sounds Yes
Java Applets Yes
VB Script Yes
Activex Yes