What? SIM-Choosing a map to call on Xiaomi Redmi 9: the full guide 2026

Xiaomi Redmi 9 remains one of the most popular budget smartphones even years after its release. Its reliability, performance and affordable price attract users, but many are faced with the question: what is the best smartphone? SIM-From the type of card to the tariff plan - each nuance affects the stability of communication, the cost of conversations and even the work of instant messengers.

In this article, we will look at all the criteria for choosing from the physical format (nano-SIM or eSIM) to the technical features of Redmi 9, such as VoLTE and 4G support. You will learn which operators offer the best conditions for calling, how to avoid network problems and what settings optimize the quality of communication.

1. Format SIM-maps: nano-SIM or eSIM?

Xiaomi Redmi 9 supports only physical nano-SIM (3FF) – this is the standard format for most modern smartphones. Unlike flagship models (for example, Xiaomi 13), there is no support for eSIM, so the options with the virtual card disappear automatically. If you already have an eSIM from the operator, it will have to be replaced with a physical or use a second slot for nano-SIM.

It is important to consider that Redmi 9 has a hybrid slot: you can install either two nano-SIMs or one nano-SIM. + This means that for maximum memory capacity (up to 512 GB), you will have to donate a second memory card. SIM-If you prioritize calls over additional storage, choose the option with two SIMs.

• 📱 Nano-SIM (3FF): Standard format suitable for all operators.
• 🚫 eSIM: Redmi 9 not supported (only in 2022 models)+ year-end).
• 🔄 Hybrid slot: either 2 SIM, 1 SIM + microSD.

⚠️ If you are buying a Redmi 9, check the integrity SIM-A common problem is that the latch breaks because of a careless card swap.

2. Network support: 4G, VoLTE and other technologies

Redmi 9 network 2G/3G/4G, But for high-quality calls, support for VoLTE (Voice over) is critical. LTE). This technology allows you to call through 4G-network, which improves sound and reduces connection time, but not all operators in Russia and the CIS support VoLTE on budget smartphones.

Before the choice SIM-Check if your carrier has activated VoLTE for Redmi 9. For example, MTS and Beeline turn on VoLTE automatically, and Tele2 may require manual configuration. If VoLTE does not work, calls will go through the phone. 3G or 2G, This reduces the quality of communication in areas with low surface.

If you make frequent roaming calls, pay attention to VoWiFi support. Unfortunately, Redmi 9 doesn’t support this feature at the firmware level, so you’ll have to rely on messaging apps (WhatsApp, Telegram) in uncoated areas.

3.Operator Choice: Comparison of Call Rates in 2026

The tariff plan directly affects the cost of calls. Redmi 9 optimal rates with unlimited minutes or a large package for calls. Consider current offers of operators (data for June 2026):

• 📞 MTS "All for communication": 500 minutes + unlimited on MTS for 350 ₽/Suitable for in-network calls.
• 🌍 Beeline "Everything is possible": unlimited on all networks for 500 ₽/Best option for active users.
• 💰 MegaFon "All Inclusive": 1000 minutes + 30 GB of Internet for 600 GB ₽/Perfect for calls and data.
• 🏆 Tele2 "My Talk": 300 minutes + unlimited on Tele2 for 200 ₽/Budgetary option.

If you are calling mainly in Russia, pay attention to the tariffs with unlimited rates for your home region. For international calls, individual options are more profitable (for example, Beeline's "Calls in the CIS" for 50 years). ₽/day-day).

⚠️ Attention: Operators often change the terms of tariffs. Before registration, check the current offers on the official website or through the operator's application (for example, My MTS, Beeline.Pro).

Check VoLTE support from the operator for Redmi 9|

Compare tariffs on the sites of MTS, Beeline, MegaFon, Tele2|

Please specify the conditions of connection (does passport registration required)|

Evaluate network coverage in your region (coverage maps are available on operators’ websites)|

Think about whether you need a second one. SIM-card or slot-->

4. Network settings: how to optimize call quality

Even with the right one. SIM-And the problem with the map and the tariff is that the calls can be interrupted or interfered with. Often the problem is network settings. Here's what you can do on Redmi 9:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map and set the priority of the network 4G (preferably).
3. Activate the VoLTE call option (if available).
4. In the section Additional → Mobile Internet, disable Autoconnection to 2G to avoid switching to slow networks.

If the calls are still of poor quality, try to manually select the operator:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Network Operators → Network Search

Sometimes, the automatic mode connects the smartphone to a less stable tower.

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If your region has a weak 4G signal but a stable 3G, prioritize your network to 3G. This can improve call quality through a more stable connection.

5. Communication problems: diagnostics and solutions

After installation SIM-Call cards are not working, check the following points:

• 🔌 SIM-The card doesn't recognize: restart the phone, check the tray is correct, if the problem persists, try another one. SIM-Card (possibly damaged chip).
• 📵 No network: make sure Flight Mode is enabled (turn it off in the notification curtain) Check account balance - some operators block outgoing calls with zero balance.
• 🔊 The interviewer can't hear you: clean the microphone of dust (use a soft brush).If the problem is in the software, reset the network settings: Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.

If none of these methods worked, it could be a hardware malfunction (such as damage to the antenna module), in which case you can contact the service center. For Redmi 9, it costs 1,500 to 3,000 to repair the communication module. ₽ (depending on the region).

6.Alternatives: Calls via messengers and Wi-Fi

If the quality of mobile communication leaves much to be desired, consider calls through instant messengers. Redmi 9 perfectly copes with:

• 💬 WhatsApp: Free calls over Wi-Fi or mobile data. Quality depends on internet speed.
• ⚡ Telegram: Supports voice and video calls with encryption, less battery load than WhatsApp.
• 🎧 Viber: Optimized for weak networks, but requires phone number registration.

For stable operation of messengers on Redmi 9, it is recommended:

1. Disable Battery Optimization for Applications: Settings → Applications → [Select Messenger] → Battery → No Limits.
2. Enable Autoboot for media files over Wi-Fi only (saves traffic).
3. Use headphones with a microphone for better sound quality.

⚠️ Attention: Calls through instant messengers consume traffic (about 1 MB / minute for voice and 5-10 MB / minute for video.

7 Budget life hacks: how to save on calls

If you call a lot but want to spend less, take advantage of these tips:

• 🔄 Call forwarding: set up forwarding to SIP-a number (for example, via Zadarma) or a second phone with a cheap fare.
• 📲 Combo tariffs: operators often offer discounts when connecting the Internet + For example, MegaFon has an All-Inclusive 1500 package with unlimited minutes and 50 GB of Internet for 800 GB. ₽/moss.
• 🎁 Bonus programs: MTS and Beeline have cashback for depositing through their applications (up to 10%).

Redmi 9 also has applications like Skype or Zoom for international calls, for example, calling the US via Skype costs 2-3 times. ₽/minute-to-30 ₽/minute on the mobile.

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The most profitable option for calls to Redmi 9 is the tariff with unlimited minutes + the use of instant messengers for international conversations.

FAQ: Frequent questions about SIM-Maps for Xiaomi Redmi 9