(Connecting to 2.4GHz WiFi instead of the newer 5GHz will likely fix your iOS11.4 battery problem.) Using your iPhone and using the Safari app (you MUST use Safari), go to, www.VanFM.com, and then click Install iOS 12 beta 3, restart your iPhone, click Setttings, General, Software Update
About 3-5 minutes later you will receive an email containing two reports (two Excel files) about the Excel file you submitted. The reports will highlight (color code) "cells of interest" that will show input, external links, and possible plugs in the file.
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