If Potato suddenly can't connect, don't rush to reinstall. Most "cannot connect" messages originate at the network layer, not the account itself. Follow the steps below in order, and you can usually pinpoint the problem within ten minutes.
Different symptoms correspond to different stages. If Potato keeps showing "Connecting" after opening, it's likely a DNS or proxy issue; if it says "No Internet," the problem is with Wi-Fi or mobile data; if only some chats receive messages and images keep spinning, it may be a system time offset causing connection verification failure. Note the symptoms first, then act.
Also, if you haven't installed the client yet, it's recommended to first check the Potato download and installation instructions to confirm the version source and avoid using modified installation packages, which are prone to connection issues themselves.
DNS translates domain names into IPs. Your carrier's default DNS occasionally fails to resolve, causing Potato to keep spinning while the browser can open other websites.
After changing, remember to disconnect and reconnect the network for the new configuration to take effect. If it recovers immediately after switching DNS, it's almost certain the original resolution service was unstable.
Turn off Wi-Fi and open Potato using only 4G/5G. If it connects, the problem is on the router or broadband side; conversely, if mobile data also fails but Wi-Fi works, your carrier may be restricting certain ports.
On the router side, try three steps: restart the router and modem; check if parental controls or access restrictions are enabled; switch Wi-Fi from 2.4G to 5G band and try again. Corporate or school networks often have firewalls, and Potato failing to connect in such environments is normal—switch to a mobile hotspot to verify.
To determine whether it's a network or client issue, you can also check the FAQ, which compiles connection error comparison tables for various platforms.
If the time offset exceeds a few minutes, the connection handshake may fail. On both Android and iPhone, go to "Date & Time" and enable "Set automatically." Devices with manually changed time zones are especially prone to issues, such as setting the time zone to UTC+0 while being in UTC+8.
Proxy and VPN are another high-frequency cause. If you've used proxy software, fully exit it rather than just switching to the background. When system-level proxy isn't completely disabled, Potato's traffic will go through an unreachable path. Check paths: on Android, look at proxy settings in Wi-Fi advanced options; on iPhone, look at "Configure Proxy" at the bottom of the Wi-Fi details page; on Windows, go to Internet Options → Connections → LAN settings and uncheck the proxy server.
If you do need to use a proxy, make sure the rules allow Potato's traffic, otherwise you'll see the typical phenomenon of "web pages open but Potato can't connect."
For account security, after the connection is restored, it's advisable to check the list of logged-in devices. For related practices, refer to the privacy and account protection guide. Frequent disconnections may also indicate your account is logged in elsewhere; promptly log out of unfamiliar devices for better safety.
Overall, Potato connection failures are mostly due to four causes: DNS, network switching, time, or proxy. Troubleshooting in order is far more effective than repeatedly uninstalling and reinstalling. When you need to re-obtain the installation package, just return to the download page to confirm the version.
Continue reading: downloads and installation, accounts and verification codes, groups, channels, and bots, and privacy and security.