How to confirm Common Name from SSL Certificate Serial Number?

Dez Member Posts: 12
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Hi, I've had glitches communicating with gmail using my Android's Chrome browser over WiFi.  I notice that the quoted SSL Certificate Serial Number is not the same as the official one at SSL Lookup (Ultratools), and wondered if this could be a factor?  Hope someone can help.  Cheers, Dez.
VioletChepil[Deleted User]