When you use a mobile proxy, the phone loads websites via mobile internet and then sends this traffic to the MobiHub Relay Server — an intermediate server that the proxy end user connects to. This is where the main problem of the standard operation scheme lies.
SmartRelay is an option in the MobiHub Android app that changes the outbound traffic route: instead of mobile internet, data is sent to the Relay Server via Wi-Fi. It solves two problems at once: eliminates speed limitations and halves mobile data usage.
To understand the benefit of SmartRelay, you need to understand how traffic generally moves through a mobile proxy.
The phone performs two actions simultaneously:
The proxy speed is determined by the minimum of the two channels. And this is where the main problem lies.
Mobile internet is asymmetrical. Operators optimize their networks for content consumption, not for content transmission. A typical picture:
The phone first downloads website content via mobile internet, and then sends it back via the same mobile internet. Each megabyte is counted twice:
⚠️ Without SmartRelay: proxy speed is limited by the mobile internet Upload channel, and SIM card traffic is consumed twice as fast as normal.
When SmartRelay is enabled, outgoing traffic goes to the Relay Server via Wi-Fi, not via mobile internet. Mobile internet is used only for downloading websites.
Result: SIM card uses traffic only in one direction (website Download), and fast unlimited Wi-Fi handles all outbound load.
Result: speed increased from 3 to ~20 Mbit/s — 6–7 times faster. SIM traffic usage halved.
Even when Upload is close to Download, without SmartRelay both channels are loaded simultaneously. The mobile operator "sees" double load and reduces speed. In practice, proxy speed ends up 10–20% lower than the phone's actual speed. SmartRelay removes Upload load from the SIM card — both channels operate without interfering with each other.
Even with a weak signal, SmartRelay helps: Upload goes via Wi-Fi and does not limit Download. Proxy speed will be ~2 Mbit/s instead of ~1 Mbit/s — a twofold improvement. Plus SIM traffic is saved.
💡 Conclusion from examples: SmartRelay improves speed in every scenario. The larger the gap between mobile internet Download and Upload — the greater the speed increase.
SmartRelay works with all protocols that MobiHub supports. Switching the Upload channel to Wi-Fi happens at the network level and does not depend on the proxy protocol.
This means you get the benefits of SmartRelay no matter which protocol you work with: browsers, automation tools, or any other software that works via SOCKS5/UDP including.
This is an important point that raises questions for new users. When SmartRelay is enabled, the phone uses Wi-Fi only to send data to the Relay Server. Website loading still happens exclusively via mobile internet. The proxy end user always sees only the operator's mobile IP. The Wi-Fi IP technically cannot appear in the proxy.
🛡️ Guarantee: Thousands of MobiHub users worldwide work with SmartRelay enabled every day. Adding the Wi-Fi IP to the proxy is technically impossible.
SmartRelay is enabled when creating a proxy in the MobiHub Android app — just check the corresponding checkbox. Available in the Professional plan of the MobiHub.biz platform for $7/month.
The correct choice of Relay server for minimal ping and understanding the traffic path are described in the article "Proxy geolocation, Relay server and SmartRelay: how it works".
SmartRelay is not just an additional option, but a fundamental improvement in mobile proxy architecture. Without it, speed is limited by the narrow Upload channel, and SIM traffic is consumed twice as fast. With it, Upload goes through Wi-Fi, traffic consumption is normal, and proxy speed approaches the phone's actual Download speed. For most users, the speed increase ranges from 2 to 7 times. Works with all protocols including SOCKS5/UDP. We highly recommend enabling it.
Be sure to check out the frequently asked questions — they contain answers to most common questions. We are also always available in the MobiHub Telegram chat — ask your question there. To stay updated on important service updates, subscribe to the @mobihubbot bot on Telegram.
Mobile proxy geolocation always follows the phone — not the server. Learn why a Relay server is required, how to choose the right one to minimize ping, and how SmartRelay eliminates the mobile upload bottleneck to deliver 30x faster proxy speeds via Wi-Fi.