Modern IP-Telephony has ceased to be the domain of corporate offices and has become a staple of smartphone users. Owners of Xiaomi, Redmi and Poco devices often wonder how to activate this feature to make free or cheap calls over the Internet. IP) Allows you to transmit voice data over protocols IP-bypassing traditional channels of mobile operators.
However, the standard shell interface MIUI or HyperOS doesn't always have an obvious "Enable" button, and users often have to dig into hidden menus of the Phone system app or install third-party ones. SIP-In this guide, we will discuss all the current ways to activate, customize profiles and optimize work for stable communication.
Don't expect everything to go smoothly on the first try. MIUI frequently blocks background processes SIP-registration, which may prevent your phone from hearing incoming calls, and we'll focus on these very details to keep your phone in touch.
Compatibility check and preparation
Before you start setting up, you need to make sure that your device technically supports the necessary protocols. Virtually all modern Xiaomi smartphones are equipped with built-in modules for working with the device. SIP-account availability, but the availability of the feature may depend on the regional firmware version (Global, China, EEA).
You need a stable Internet connection. For high-quality voice communication, it is recommended to use low-latency Wi-Fi or mobile Internet standard 4G/LTE and higher. On older 3G networks, the sound quality may be poor due to lack of channel bandwidth.
- 📱 Make sure you have a valid account with the provider. IP-telephony (login, password, server).
- 🌐 Check the speed of the Internet, it should be at least 100 Kbps for one channel.
- 🔋 Charge the device to at least 40% to avoid turning off during setup.
It is also worth preparing data from your operator or virtual PBX in advance. IP-address, port number (often 5060), username and password.
Activation of built-in SIP-client
In most MIUI firmware, the SIP function is already built into the Phone system application, but it is hidden from the eyes of the average user. To find it, you need to go to the call settings. Open the Phone application, click on the three dots in the upper right corner and select Settings.
In the menu, look for the Accounts item. SIP or SIP-If you see this section, your version of the shell supports native integration, and if it doesn't, it may be hidden in deeper settings or not in your software modification, and then you'll have to use third-party apps.
⚠️ Attention: Some global firmware versions for Europe and Russia section SIP It can be software-based, it can be hidden by the operator or by the manufacturer itself, and then the standard call settings path is the one that you can use. → Accounts. SIP It won't work.
If you find a partition, click on it and select the addition of a new account, the system will prompt you to enter data received from the provider, it is important to enter information without unnecessary spaces and the format specified by the provider.
☑️ Checking entry data
Manually configuring profile parameters
When you create a new profile, the system will offer several configuration options, most home and office PBXs will suit the standard type of “Normal”, however, if you are setting up a corporate communication or a specific provider, manual adjustments may be required.
Pay special attention to the field Use for calls. Here you can choose when the phone should offer SIP-calls: only on Wi-Fi, only on mobile Internet or always. To save traffic, you should choose the option “Only through Wi-Fi” if you do not use unlimited data packages.
| Parameter | Default value | Recommendation |
|---|---|---|
| Transportation | UDP | Leave UDP (faster) if there are no problems |
| Port port | 5060 | Change only at the request of the provider |
| Registration | On. | Make sure to |
| Accept challenges | Only Wi-Fi. | Depends on the tariff plan |
In the username field, you often need to enter not just a number, but a full SIP-URI (for example, 1234567890@provider.com). This is a common error that causes registration to fail. Consult your operator's technical support if the standard number entry does not work.
What is UDP and TCP transport?
Configure third-party applications (Softphone)
If the client is not built in or is not running smoothly, the best solution is to install a specialized application from Google Play, which is considered to be the market leader Zoiper, Bria or 3CX. They have more flexible codec settings and better cope with switching between networks.
Once you install an app like Zoiper, you'll need to create a new account manually. The interface will be different from the system one, but the essence will remain the same: login, password and domain, and third-party customers have the advantage of having built-in communication quality tests and detailed logs.
It is important to choose the right audio codec. First, you should leave the automatic choice or prioritize G.711 (PCMU/PCMA), as it provides the best sound quality when you have good Internet. G.729 or Opus codecs save traffic, but can sound worse on bad channels.
- 📥 Download the Zoiper app or 3CX Play Market.
- ⚙️ Enter the data SIP-account in the Settings section → Accounts.
- 🎙️ Conduct an Echo test to check the sound.
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Third-party applications often work more stable than embedded ones, as they better control background processes and have their own reconnection mechanisms when the network breaks.
Optimizing the battery and notifications
This is the most critical section for Xiaomi owners.Aggressive energy saving system MIUI By default, it kills background processes SIP-As a result, the phone may not ring when the screen is off.
To fix this, go to Settings → Applications → All apps. Find your calling app (system phone or installed Zoiper). Go to Saving Charge and select No Limits.
⚠️ Warning: Without setting “No Limits” you are guaranteed to miss incoming calls when the phone is in your pocket or lying on a desk with a screen gone.
You also need to allow auto-start. In the same app settings menu, find the Auto-Start switch and activate it, which will allow the app to start immediately after the phone is turned on and register on the server.
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Once you have set up the power saving, swipe the application, but don't delete it completely. Sometimes it takes the system a little bit (about 1-2 minutes) to understand that the process is important and stop limiting it.
Addressing common problems
Even if you're properly configured, you can have a problem. If you hear someone who's not there, check the microphone's permissions. Go to Settings. → Annexes → Permits → Microphone and make sure your SIP-client.
The problem with one-way audibility or interruptions is often found in the NAT. If you're behind a home router, try rebooting it. In rare cases, port rolling is required, but for most users, it's enough to change the transport protocol in the account settings from UDP to TCP or TLS.
If registration is constantly broken (the status of "Registration..." is replaced by an error), check whether the antivirus or firewall connection is blocked. SIP-The operator has funds, as some providers disable registration at zero balance, even for incoming.