Answered
Update
Sonos app said an update was needed. After update, Trueplay, EQ settings are not available. Under settings the following options are available: app settings, date and time, system, about, reset, submit diag. I am running iOS 9 on a iPhone 4s. What is really frustrating is that it has been working fine until the update. Help !!!
Best answer by jgatie
https://www.sonos.com/en-us/software/release/9-3
System requirements, alerts & warnings
Minimum OS requirements
Android 5.0 or later
iOS 10 or later
macOS 10.11 or later
Windows 7 or later
Operating systems iOS 9 and Android 4.x are now partially supported by the Sonos App. Devices running iOS 9 or Android 4.x can still browse, search and play music using this version of the Sonos app. Less common tasks like adding new speakers, modifying music services, or setting up a new Sonos system require Android 5.0 or higher, or iOS 10 or higher.
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