Strange wifi problem, laptops work fine, phones do...

we have a homehub3 and have just started having a very strange problem
The laptops in the house all connect and work fine over the wifi as normal, but as from yesterday our, ipad, 2 iphones and a samsung galaxy all connect to the wifi, but cant actually use the internet. we've tried restarting everything, forgetting the wireless connections on the phones and reconnecting but nothing appears to work. Any suggestions?

Have never heard of that problem before so can only give you an idea of some things to check.
Check in the Homehub management that it is not set to block access to the mobile devices. If you did a factory reset of the hub then it should have cleared any settings but it might be worth checking.
Have you checked that they are connecting to your Homehub and not to BTWifi which would require further log on to get internet access.
What exactly is happening with the devices when you try to connect to the internet. Is it all things to do with the internet or can you connect by 3g?
Have you tried to connect using another router such as at a friends house?  

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    Have never heard of that problem before so can only give you an idea of some things to check.
    Check in the Homehub management that it is not set to block access to the mobile devices. If you did a factory reset of the hub then it should have cleared any settings but it might be worth checking.
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    What exactly is happening with the devices when you try to connect to the internet. Is it all things to do with the internet or can you connect by 3g?
    Have you tried to connect using another router such as at a friends house?  

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