Blinking yellow light on your Apple Airport needs attention. Fnd out what the problem is and update firmware using the Airport Utility.
Blinking Yellow Light on an Apple Airport– what it means, what to do
How to Fix iMessage “Waiting for Activation” on iPhone
Is iMessage on iPhone stuck, "Waiting for activation"? Apple's suggestions don't always work. Here's how to activate iMessage the right way.
How I Fixed an iPhone that Couldn’t Get Mail Unless On WiFi
iPhone's Mail app worked on WiFi, but not on cellular. Yet Safari worked fine whether on cellular or WiFi. Hmmm. Here's how I fixed things.