The 30-second version
Wi-Fi calling (VoWiFi) carries normal calls on your own number over a Wi-Fi connection, so you can talk in rooms where the mobile signal gives up. Jio, Airtel and BSNL charge nothing extra for it; Vi charges for these calls according to your tariff and runs the service in selected circles only. Keep VoLTE on, join a working Wi-Fi network, then turn on Wi-Fi Calling in your SIM settings on Android, or under Settings › Cellular (Mobile Data on some iPhones) on an iPhone. Don’t count on it for emergency numbers.
In this guide9 sections
- What actually happens on a Wi-Fi call
- Where each operator stands in late 2026
- Check these before you hunt for the switch
- Where the switch is on Android phones
- Turning on Wi-Fi Calling on an iPhone
- How to tell a call went over Wi-Fi
- Fixes matched to what you see
- More questions about calling over Wi-Fi
- Where the details were checked
What actually happens on a Wi-Fi call
Instead of reaching your operator through the nearest tower, the phone reaches it through the internet. You still dial from the normal Phone app, the other person still sees your usual number, and, as BSNL’s launch note points out, no third-party app is involved. Whoever you ring needs nothing special either: Airtel says you can reach any phone on any network. The feature is meant for exactly the spots where the bars vanish: Apple’s guide talks about areas with little or no mobile coverage, and Google says some operators allow Wi-Fi calls even without mobile service.
- The data comes from your Wi-Fi, not your mobile pack. Jio puts a voice call at under half an MB a minute, and Airtel says five minutes of talking uses less than 5 MB.
- Losing Wi-Fi mid-call needn’t end the call. With VoLTE switched on, Airtel says the call shifts to its mobile network seamlessly; without VoLTE it simply ends. BSNL also describes seamless handover between Wi-Fi and its mobile network.
- The phone picks a route. Jio says its calls go over the stronger of Wi-Fi and mobile, and many Android phones let you set a calling preference once the feature is on.
Warning: Don’t treat Wi-Fi calling as your emergency line. Jio lists 112, 100, 101, 102 and 108, along with location-based short codes such as 1070 and 1078, among the numbers that can’t be reached over Wi-Fi Calling. Apple says an iPhone uses the mobile network for emergency calls whenever one is available.
Where each operator stands in late 2026
| Operator | Coverage | Cost | What you need | When travelling |
|---|---|---|---|---|
| Jio | Across India | Included at no additional charge | An existing voice plan and an HD voice (VoLTE) phone; on iPhone, a 6s or later | From abroad, international Wi-Fi Calling lets you ring India for ₹1 a minute, per Jio’s roaming FAQs |
| Airtel | All circles except Jammu & Kashmir, on any broadband or Wi-Fi hotspot | No additional charge; deducted like a regular call | An Airtel 4G SIM, a capable handset, the latest software and VoLTE on | Works on national roaming (not in J&K); not on international roaming |
| Vi | Only the circles listed below | As per your plan: nothing separate on unlimited packs, base tariff otherwise | A 5G-ready SIM (every Vi 4G SIM counts) with VoLTE, a supported handset and current software | Restricted to the same listed circles |
| BSNL | Every telecom circle since 1 January 2026, over Bharat Fiber or other broadband | Free, with no additional charges | Most modern smartphones; you only switch it on in settings | Not stated by BSNL |
Vi’s circle list, in alphabetical order: Andhra Pradesh, Bihar, Delhi, Gujarat, Haryana, Karnataka, Kerala, Kolkata, Madhya Pradesh & Chhattisgarh, Maharashtra & Goa, Mumbai, Punjab, Rajasthan, Tamil Nadu, Telangana, UP East, UP West and West Bengal. Its FAQ section omits Andhra Pradesh and Telangana, so customers there should confirm with Vi before relying on it.
Check these before you hunt for the switch
- VoLTE is on for that SIM. Airtel and Vi both want VoLTE switched on alongside Wi-Fi Calling, and Airtel says VoLTE is what lets a call move across when Wi-Fi fades. Some phones call it HD Voice or VoLTE calls, and you’ll normally find it next to the network type setting described in our guide to a missing 5G signal.
- Your phone supports it on your operator. Airtel and Vi want the latest system update installed first, and Vi’s page has a handset checker. Apple says a network provider settings update can add Wi-Fi Calling. BSNL hasn’t published a model list; for compatibility questions it points customers to its nearest customer service centre or its helpline.
- The Wi-Fi really has internet. Vi says call quality depends on the strength of the Wi-Fi rather than the mobile signal, and Apple notes that not all Wi-Fi networks work with Wi-Fi Calling.
- Airplane mode is off. Airtel and Vi both say their service doesn’t work in airplane mode.
- You’re setting up the right SIM. On a dual-SIM phone, switch it on for the number you actually call from.
At the counter: When poor signal at home or at work has someone thinking about a new phone, we first check whether their present phone can already make Wi-Fi calls on their network, and only then talk about upgrading. It’s worth doing that check yourself before you spend anything.
Where the switch is on Android phones
Connect to Wi-Fi first. The option usually shows up only when your operator and your handset both offer it; Google says that if a Pixel doesn’t show it, your operator doesn’t provide the service.
| Brand | Where to find it | What to turn on |
|---|---|---|
| Samsung Galaxy | Settings › Connections › Wi-Fi Calling. Samsung India also points to the Phone app (⋮ › Settings) and to a Quick settings tile for Wi-Fi Calling | The Wi-Fi Calling switch, for the SIM you call from |
| Xiaomi, Redmi, POCO | Settings › SIM cards & mobile networks (Mobile networks on newer HyperOS builds) › your SIM | Make calls using Wi-Fi |
| Google Pixel | Settings › Network & internet › SIMs › your SIM › Wi-Fi calling | Use Wi-Fi calling |
| OPPO, realme, OnePlus | Settings › Mobile network › your SIM (SIM Card & Mobile Data on older realme builds) | Wi-Fi calling; realme suggests choosing Wi-Fi calling preferred |
| vivo, iQOO | The SIM settings for your number, under the Network & internet or Mobile network menu depending on the version | VoWiFi |
Turning on Wi-Fi Calling on an iPhone
- Open Settings and tap Cellular. Depending on the iOS version and language, this menu may read Mobile Data or Mobile, and with two SIMs installed you may see Mobile Service.
- If the iPhone has more than one SIM, scroll to the line you want to use.
- Open Wi-Fi Calling and turn the Wi-Fi Calling on This iPhone switch on.
- Confirm with Enable. The iPhone may ask you to type in or confirm the address emergency services would use.
Apple’s India carrier-feature page, dated February 2026, lists Wi-Fi Calling only against Airtel and Jio. Vi appears without it, and BSNL isn’t on the page at all, so Vi and BSNL users should check with their operator if the switch never appears. Jio asks for an iPhone 6s or later on iOS 11 or above, with the latest software and an active Jio tariff plan.
Tip: Can’t see the option at all? Connect to Wi-Fi and open Settings › General › About. If your network provider has a settings update waiting, the iPhone offers to install it, and Apple says such updates can add support for features like Wi-Fi Calling.
How to tell a call went over Wi-Fi
- iPhone: open Control Centre and look at the status bar. Seeing the word “Wi-Fi” there means the feature is ready and calls will go through it.
- Pixel: Google says the notification screen shows “Internet call” or “Wi-Fi calling” while you’re connected.
- Vi users on any phone: Vi says a WiFi Calling icon appears in the top bar during the call. Other brands use their own icon, often marked VoWiFi.
- The practical test: stay on Wi-Fi, go to the corner where your bars are lowest and phone someone. A clear call there means it’s working.
Fixes matched to what you see
| What you see | Likely reason | What to try |
|---|---|---|
| No Wi-Fi Calling option anywhere | The operator or handset doesn’t support it, VoLTE is off, or the software is old | Turn on VoLTE, update the phone (and, on an iPhone, the network provider settings), then check your operator’s handset list |
| The switch is on, but calls still use the mobile network | The phone prefers mobile signal, or this Wi-Fi network doesn’t work with Wi-Fi Calling | Set the calling preference to Wi-Fi where your phone offers one, or try another Wi-Fi network |
| Calls cut out as you walk away from the router | Wi-Fi fades and VoLTE isn’t on to take over | Switch on VoLTE so the call can hand over to the mobile network |
| The option keeps turning itself off | Google says the phone disables Wi-Fi calling when it detects a problem, until that is fixed | Restart; if it keeps happening, ask your operator to reactivate the service |
| Fine at home, fails while travelling | Vi covers only its listed circles; Airtel excludes J&K and international roaming | Rely on the mobile network in those places |
| Works with one SIM, not with another operator’s SIM in the same phone | Support depends on the operator and on the phone’s software for that operator | Update the phone and ask that operator whether your model is supported |
If nothing in the table helps, work through these, giving each one a couple of minutes as Apple suggests:
- Turn Wi-Fi Calling off and on again, then restart the phone.
- Test the Wi-Fi itself: load a website, restart the router, or join a different network.
- Reset network settings as the final step, after noting your Wi-Fi password, because saved networks are wiped. On an iPhone, go to General in Settings, open Transfer or Reset iPhone, tap Reset and pick Reset Network Settings. On a Pixel: Settings › System › Reset options, then Reset mobile network settings. On a Xiaomi: Settings › Connection & sharing, then the Reset Wi-Fi, mobile networks, and Bluetooth option.
- Ring your operator and have them check that the service is switched on for your number and model. For BSNL, use 1503 from its own lines or 1800-180-1503 from other networks.
More questions about calling over Wi-Fi
Can I use Wi-Fi calling when I’m abroad?
It depends on the operator. According to Airtel, its service can’t be used on international roaming, and Vi keeps the service inside its listed Indian circles. Jio offers international Wi-Fi Calling for ringing India from anywhere over Wi-Fi, at ₹1 a minute according to its roaming FAQs; check your roaming pack before you travel.
Will office, hotel or café Wi-Fi work?
Often, yes. Airtel says its service is live on all broadband connections and Wi-Fi hotspots, while BSNL mentions its Bharat Fiber service or any other broadband connection. Still, Apple cautions that not every Wi-Fi network works with Wi-Fi Calling, so if calls fail on one network, try another before blaming the phone.
Should I set the phone to prefer Wi-Fi or the mobile network?
Where your phone offers a calling preference, a Wi-Fi first setting suits a home with poor mobile signal, and realme recommends its Wi-Fi calling preferred option. Samsung explains that if the network you prefer isn’t available, the phone uses the other one automatically.
Will bank codes reach me when I’m only on Wi-Fi?
On some networks. Airtel’s FAQ says texts are covered too, both SMS and MMS, and BSNL says its VoWiFi carries messages as well as calls. Jio’s and Vi’s Wi-Fi calling pages only talk about calls. If codes still go missing, our guide to OTP SMS that never arrive walks through the other causes.
Can I call an international number over Wi-Fi from India?
Airtel and Vi both say yes. Airtel treats a Wi-Fi call exactly like a regular call, and Vi bills it as per your tariff plan, so your plan’s usual international rates apply.
What to do now: Turn on VoLTE, join a Wi-Fi network that works, switch on Wi-Fi Calling for the SIM you call from, and test it in the room with the weakest signal. If the option never appears, install updates and ask your operator whether your model is supported.
Where the details were checked
- Jio help: what Wi-Fi Calling is · emergency and location-based numbers · data use · iPhone requirements · international roaming
- Airtel: how its Wi-Fi Calling works · Airtel: answers on charges, roaming and handover
- Vi WiFi Calling: circles, charges, handset checker and FAQs
- PIB, 1 January 2026: BSNL launches VoWiFi in all circles · BSNL customer care numbers
- Apple Support: making a call with Wi-Fi Calling · Apple’s India carrier-feature list · updating carrier settings on iPhone · iPhone User Guide: what a network settings reset removes
- Phone by Google Help: making Wi-Fi calls · Google Pixel help: fixing mobile network problems
- Samsung India support: Wi-Fi Calling set-up · Samsung US support: calling preference and emergency address
- Xiaomi support: Wi-Fi calling troubleshooting and network reset · realme India support: enabling VoWiFi
Each link above was last checked on 29 October 2026.
