iPhone 6 activation information could not be obtained

Did you recently buy this phone or is this a new problem on a phone you have been using for a long time?

If this is a new problem, try the steps here: How to remove Activation Lock - Apple Support

If you recently bought this phone, ask the seller to remove the activation lock by following the steps in the link below:

What to do before you sell, give away or trade in your Apple Watch, or buy one from someone else – Apple Support (UK)