@Nikki_stacey if other devices are staying connected check your phone's settings that you do not have an option set to use mobile data if its faster than wifi - most phones have one but they can be quite hidden.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
