@David-TP Sorry for the very slow reply. The Samsung S20 only experiences intermittent delays sending WhatsApp messages when connected to the 4G router. Over other Wi-Fi networks or via 4G (outside...

Hello all I wonder if anyohne can offer me some advice. I have a TL-MR6400 with a UK Vodaphone SIM. All works well with exeption to sending / receiving WhatsApp messages from Samsung (Android) S20...