DNS not working when on T-Mobile network

Zaphod128

New Member
I’ve been using AdGuard with native DNS for a long time on my iPhone (iOS 15.2). But now I’m having trouble when using cellular data. If I have AdGuard’s DNS function turned on, I totally lose internet connectivity when I’m using T-Mobile cellular network, off of WiFi. The only way I can use cellular data is to turn AdGuard DNS off.
Anyone else having this issue? Anyone know of a solution?
 

klyzhoft

New Member
I'm having the same issue, also on T-mobile.
I seem to lose connectivity when I switch networks, cell to wifi or wifi to cell.
Refreshing the Adguard filters seems to temporarily help with connectivity.
Very frustrating.
 

Zaphod128

New Member
I think I have a solution. I changed the AdGuard DNS server from "regular" to DNS-over-HTTPS and now it's working again
 

KenZen

New Member
I also have this problem. I tried to solve it by enabling/disabling the "Restart protection on network change" option in advanced settings.
Currently it seems to work better by turning the switch off.
Greetings
 

Bastet

New Member
I also have this problem. I tried to solve it by enabling/disabling the "Restart protection on network change" option in advanced settings.
Currently it seems to work better by turning the switch off.
Greetings
That setting is off on my phone but the problem remains. I have to turn off DNS filtering in order for cellular to work. :(
 
Yep, same but with Three.

Worked fine seemingly up until the last update a few days ago (4.3.1).

Cannot access mobile data at all except by turning AdGuard DNS off altogether in the app. Tried just turning the new Safari 'advanced protection' extension off and that didn't work (I thought that might have been the cause since the release of that extension coincided with the issue, but it doesn't appear to be).

The whole DNS element seems to be straight up broken on the most recent version for mobile data. Made for a very long train ride the other day when I had no ability to stream music...
 

bent

New Member
I have having the same issue on Telstra (Australia). Unable to load anything while on cellular. Switching off the VPN/AdGuard DNS resolves instantly. The issue started with v4.3.
 

a.shulgin

Quality Assurance
Staff member
Administrator
Moderator
Everything is fine, this problem has already been fixed in the beta version.
 

Trumpsaduck

Member
Been trying out ver 4.3.2 and it’s a beta. Bugs, of course, but since 2020, all versions of Adguard seem like flipping alpha’s!
 

nickjr05

New Member
Same problem but ATT. Every time I turn on DNS it’s kills WiFi data and cell data. It completely disconnects we from WiFi as well.
 

Bastet

New Member
Update: I turned on restart protection when network changes & the problem below has disappeared.

Can users affected check something for me? Under Settings>General>advanced settings>content blockers are all the entries showing ‘0 rules are being used‘ & you have dns disabled when on cellular (under dns protection>network settings>filter mobile data). I have dns off while on mobile connection & find that when I switch to cellular that the entries show 0 rules in use, moving back to wifi the problem remains though until I turn on dns for cellular & refresh the rules & then they show.
Thanks.
 
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