In reply to a post by GonePostal:

Why would you want to change the guide for something that is just not true for most people.

have you tried all of the measures laid out in the two links Mr. Saffron provided?

Isn't a guide suppose to warn people of what could happen?

Yes I have tried all of the things in the two links

In reply to a post by zelly:

ISPs should be warning people that if they change ISP, they could loose their email account

Can you please provide some stats to give an indication of the scale of this issue?

Can you please provide some stats to give an indication of the scale of this issue?

If it can happen to 1 person, it can happen to anyone

In reply to a post by gmangt4:

maybe if never used before ISP and a new device being used for first time to access your Gmail they might ask for verification?

I've been using the same computer and same browser since I made the email account

The only thing I changed is my ISP

In reply to a post by zelly:

If it can happen to 1 person, it can happen to anyone

Maybe you could ask yourself, is it me?

We get lots of people here who move ISP's and then wonder/complain why their ISP provided email stops working but never in 30 years have I heard anyone say they lost there independent email

In reply to a post by zelly:

In reply to a post by gmangt4:

maybe if never used before ISP and a new device being used for first time to access your Gmail they might ask for verification?

I've been using the same computer and same browser since I made the email account

The only thing I changed is my ISP

Your first image says device not recognised so they seem to think its never been used to access that account before? I can't see it being an ISP personally, I used to travel worldwide with my job and was never an issue, Before I retired I used to have Gmail open on my work PC on employers VPN and on my phone on mobile data so would be a different ISP at the same time....as would many.

It is something that Google should be warning about rather than ISPs. If Google are going to block access because you have change ISP (or even just IP address) then they should make that clear. Google are the ones providing the service that has broken and seem to be applying over zealous security (unless there are other factors that we don't know about that have led to the account being blocked).

You simply need to follow the forgot password prompts. Keep pressing that I cannot do in the way that is requested (if you get the prompt about entering a 2 digit number ignore and you'll get another prompt up after about 30 seconds). Once you go through this rigmarole it will then ask you for a contact number so Google can call you back. If it's your account they will ask you questions about how the accounts been used and then get it unblocked for you.

In reply to a post by zelly:

ISPs should be warning people that if they change ISP, they could loose their email account

But you haven't. What you've done is blindly rushed forward without following information supplied, even on this topic.
I've had a Gmail account since the days of the trials, where a friend had to invite you to join. I've changed ISP's several times but never lost access.
Read what people are telling you here, especially the one here https://forums.thinkbroadband.com/general/t/4635939-... (click the link to read it) - gary333 has given the steps needed to get your account back.
It has nothing to do with changing ISP, the ASA or reading any sort of guide. It's because you have ignored warning messages.
Can't make it any clearer than that.

What has happened to you is rare, at least in terms of what we've seen i.e. a sample of 1 is not going to see us adding a warning to a guide.

Have also used devices on numerous ISP and numerous devices and not had a problem, but then do have two factor authentication and recovery options set.