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In the Vodafone Wi-Fi Hub it says I can change the setting and merge the SSIDs "to make your Wi-Fi work optimally." In the Vodafone App it says split Wi-Fi "can improve overall Wi-Fi performance"
Does anyone know which is correct?
To save me writing it out (I'm only a 2 fingered typist) I will point you to somewhere else:
There are lots of other discussions if you google it.