I have successfully got this up and running on my router at first everything seems fine.
The problem I have is I have a Vodafone sure signal on my network that will no longer connect. Is there a setting within pi hole to allow it through. Pi hole is currently set as my dns server through the router.
There are two options for you.
Option 1,
log into the pi,
run pihole -t whilst trying to use your vodaphone,
see what is being blocked, and whitelist the domain.
Option 2
Allow the mac address of the vodaphone to bypass pihole dns, and use dns straight from another source.
cd /etc/dnsmasq.d
sudo wget https://raw.githubusercontent.com/deathbybandaid/piadvanced/master/piholetweaks/dnsmasqtweaks/04-bypass.conf
sudo nano 04-bypass.conf
apply the mac address of the device you wish to bypass
I recently updated this file, and it now includes more options.
Edit: updated link