This article is written to help users clear Cache and Data for JSMobile - Service Management Portal.
Step 1: Go to Settings > General > iPhone Storage. Scroll down to the list of apps and tap on o JSMobile - Service Management Portal to clear.
Step 2: Next, tap Delete App. Tap Delete App again to confirm.
Step 3: If you want to reinstall the app (without the documents and data you’ve just deleted), go to the App Store and reinstall it.