@David-TP Hi, Yes, I have reverted back to the old setup with the Sky router and WhatsApp is working again. It also works via mobile data. I tried the DNS 8.8.8.8 I didn't have Security + or any...

Very disappointing. I bought a three BE25 (BE3600) setup to boost the wi-fi coverage around the house and in my wife's office. Unfortunately, I have now discovered that although all our devices...