Modern tablets have long since ceased to be mere content consumption devices. Powerful hardware and high-quality microphones make them an excellent alternative to smartphones, especially when you need to make a call and don't have a mobile connection. call via the Internet opens up broad horizons for travelers, freelancers, and those looking to save on operator tariffs.
The main issue users face is the lack of a SIM card slot or the availability of a Wi-Fi-only model. However, this limitation is easily overcome with modern technology. VoIP (Voice over IP). Voice over Internet Protocol (VoIP) enables high-quality voice traffic transmission using only a stable wireless connection.
In this article, we'll take a detailed look at all available communication options, configure the necessary apps, and troubleshoot common audio issues. You'll learn which services provide the best connection quality and how to turn your tablet into a fully-fledged communication tool without being tied to a SIM card.
How VoIP telephony works on tablets
Technology VoIP It's based on converting analog voice signals into digital data packets. These packets are transmitted over the internet and reassembled into audio at the receiving end. For a tablet, this means it doesn't need a cell tower; any router with internet access is sufficient.
Connection quality directly depends on channel bandwidth and ping stability. Unlike cellular communications, where the signal can fluctuate due to distance from the base station, indoor Wi-Fi networks typically provide a more stable data stream unless the router is overloaded.
There are two main types of calls: App-to-App (from app to app, for example, WhatsApp to WhatsApp) and App-to-Phone (from an app to a regular phone number). While the first option requires the other person to also have the app installed, the second option allows you to call any landline or mobile number worldwide, often for a nominal fee or for free during a trial period.
⚠️ Attention: The quality of VoIP communication critically depends on speed Upload your network. Even with a high download speed, a low upload will result in interruptions in your voice and a robotic sound.
Why might the voice be interrupted?
The main cause of interruptions is jitter, or uneven data packet delivery. A router can prioritize page or video loading, while prioritizing voice traffic. The solution is to enable QoS in the router settings, prioritizing VoIP.
Setting up instant messaging apps for Wi-Fi calls
The easiest and most accessible way to contact someone is to use popular instant messaging apps. Apps like Telegram, WhatsApp And Viber are already pre-installed on many devices or can be easily downloaded from official stores App Store And Google Play.
To get started, you'll need an account. Important: for initial registration with most messaging apps, you'll still need a phone number (to receive a confirmation code via SMS). However, after registering on your tablet, you can use the "companion device" mode or the web version if your primary account is already activated on your smartphone.
In the settings of each application you should check the section Privacy And DataMake sure the app is allowed to use the microphone and network access in the background. This will allow you to receive incoming calls even when the tablet's screen is off.
- 📱 WhatsApp: Excellent audio compression, works even on weak 3G, but requires a constant connection to the main phone to work on the tablet (in Linked Devices mode).
- ✈️ Telegram: Allows independent work on a tablet if the account is already activated, supports high-quality calls.
- 📞 Viber: It has a Viber Out function for calls to regular numbers and convenient synchronization of call history between devices.
Using SIP telephony and virtual numbers
For more serious tasks, such as work or business, instant messaging apps may not be enough. This is where SIP telephonyThis is a professional standard that allows you to connect virtual numbers from cities around the world and call landlines.
To use this method, you need to sign a contract with a SIP provider (such as Zadarma, Mango Office, or Sipnet). After registration, you will receive a username, password, and server address. This information is entered into a special softphone app installed on your tablet.
Popular clients for Android and iOS are Zoiper, Bria And LinphoneThey offer a user-friendly dialing interface, call history, and the ability to customize codecs to improve call quality. Unlike messaging apps, you pay per minute or purchase bundles, but you get a full-fledged phone number.
Example of setting up a SIP account:Server: sip.provider.com
Username: 100123456
Password: s3cr3t_p@ssw0rd
Codec Priority: G.722, OPUS, PCMA
⚠️ Attention: When using SIP telephony via public Wi-Fi networks (cafes, airports), be sure to use VPN or the TLS encryption protocol, since voice traffic can be intercepted.
☑️ Checking your SIP call readiness
Specialized applications for calling regular numbers
If you need to call mobile and landline numbers without a contract with a carrier, there are aggregator services. They operate on the principle of "top up your account and call." These apps are often called "second line."
One of the leaders in this niche is the application SkypeIt allows you to purchase calling subscriptions to specific countries or credits for one-time calls. Skype's call quality is traditionally high thanks to its advanced server infrastructure.
It is also worth paying attention to services like TextNow or Google Voice (Works primarily in the US, requires bypassing restrictions). They can provide you with a virtual number that other people can call. This turns your tablet into a fully functional phone with incoming calls.
| Application | Type of calls | Do you need a number? | Payment |
|---|---|---|---|
| Skype | To mobile/landlines | No (account only) | Credits/Subscription |
| App-to-App | Yes (for registration) | Free (traffic) | |
| Zadarma | SIP / City | No (virtual number) | Account replenishment |
| TextNow | USA/Canada | Issued by the application | Advertising/Subscription |
Organizing calls through the Apple and Google ecosystems
Device owners Apple have a unique advantage due to the function ContinuityIf you have an iPhone, you can make and receive calls from it directly to your iPad, even if the tablet itself doesn't have a SIM card. The iPhone acts as a gateway.
To activate this feature, both devices must be connected to the same Wi-Fi network and use the same Apple ID. In iPhone Settings, go to Settings → Cellular → Calls on other devices and allow calls on your iPad.
Users Android can also take advantage of Google integration. Through the app Google Phone (if supported on your tablet) or through the Google Voice web interface, you can make calls. Additionally, Samsung tablets with One UI allow you to sync calls with your Samsung smartphone via your Samsung Account.
It's important to note that for these native features to work, both devices must be within Bluetooth range or connected to the same Wi-Fi network. This ensures minimal signal latency when switching devices.
⚠️ Attention: The iPad calling feature only works when the iPhone is turned on and connected to a network. If the iPhone is turned off or the battery is low, the tablet won't be able to make calls over the carrier's cellular network.
Solving problems with sound and call quality
Even with the perfect setup, you may encounter echo, silence, or interruptions. First, check your tablet's privacy settings. Make sure the app you're using to make calls has permission to access your data. microphone.
A common problem is echo. It occurs when sound from the tablet's speakers bounces back into the microphone. The solution is simple: use a headset or headphones. This will physically separate the sound source from its receiver, eliminating the acoustic effect.
If the connection is interrupted, try switching the tablet to a different frequency. 5 GHz, if your router supports dual-band operation. This band is less congested with neighboring networks and provides more stable voice packet transmission than the standard one. 2.4 GHz.
- 🔇 Echo: Turn down the speaker volume or put on headphones.
- 🤖 Robotic voice: Close background applications that consume traffic (torrents, downloads).
- 📉 No sound: Check if a different audio output device is selected in the app (for example, a Bluetooth speaker that is turned off).
What should I do if the microphone doesn't work in the app?
Go to your tablet's Settings → Apps → [Your app] → Permissions. Make sure the "Microphone" slider is enabled. If that doesn't help, uninstall and reinstall the app.
Comparison of methods and selection of the optimal solution
The choice of calling method depends on your goals. For personal communication with friends, instant messaging is sufficient. For business negotiations, SIP telephony or Skype are better options, as they offer more control and a professional number.
If you travel frequently and are roaming, using Wi-Fi Calling through apps is the only way to avoid huge mobile bills. Your tablet becomes your main communication hub at a hotel or cafe.
Don't forget about security. When making calls over public networks, use encrypted communication channels. Messengers with end-to-end encryption (Signal, WhatsApp) are more secure in this regard than standard SIP lines without TLS.
Ultimately, a modern tablet is a powerful communication tool that, when properly configured, can completely replace a phone. The key is a stable internet connection and the right software.
Is it possible to call regular mobile numbers for free?
There are no completely free and legal ways to call regular numbers (not those of app users), as operators charge a termination fee. However, many services (Skype, Zadarma) offer a starting bonus or allow free calls to certain countries (often the US and Canada) as part of promotions.
Do you need a SIM card to register for WhatsApp on a tablet?
A phone number is required for initial account registration. However, you can use the SIM card number inserted into your smartphone or a virtual number. After receiving the confirmation code, the SIM card in your tablet is no longer needed; Wi-Fi is sufficient.
Why can't people hear me when I call over Wi-Fi?
Most often, the issue lies in your OS privacy settings. Check whether microphone access is allowed for the specific app. Also, make sure that no other app (such as a voice recorder) is running during the call and hijacking the microphone.
How to improve sound quality when the internet connection is poor?
In the app settings, find the "Audio" or "Calls" section and select a low-bitrate codec (e.g., G.729 or OPUS Low Bandwidth). Also, close all background downloads and videos on other devices online.