How to Call Between USA and India: Complete Guide

Dialing Codes for USA-India Calls

Making a clear connection between the United States and India starts with the right dialing codes. Use these quick references to dial correctly from either side.

Basics

• USA country code: +1
• India country code: +91
• USA international dialing prefix (when calling out from a US landline): 011
• India international dialing prefix (when calling out from an Indian landline): 00
• The “+” replaces the international access code and works on mobile phones when you long-press the 0 key.

How to call India from USA (examples)

• From a US mobile: enter +91 then the Indian area or mobile number (omit India’s leading 0). Example: +91 22 1234 5678 for a Mumbai landline or +91 98XXXXXXXX for an Indian mobile.
• From a US landline: dial 011 91 [area code without 0] [local number]. Example: 011 91 11 2345 6789 to call a Delhi landline.

How to call USA from India (examples)

• From an Indian mobile: enter +1 then the US 10-digit number. Example: +1 212 555 1234.
• From an Indian landline: dial 00 1 [area code] [local number]. Example: 00 1 310 555 1234 to reach Los Angeles.

Area code notes

• When calling an Indian landline from abroad, drop the leading 0 in the area code (e.g., Delhi 011 becomes 11).
• US phone numbers use a 3-digit area code plus a 7-digit local number (no leading zero to drop).

If you get a recorded error, hang up and try again using the + format from a mobile. Most modern mobile networks accept +91 or +1 without any additional prefix.

Mobile vs Landline Calling Procedures

Calling procedures vary by device and network. Understanding the differences will save time and money.

Using a mobile phone

• Use the + country code format (for example +91 or +1). On most smartphones you long-press 0 to enter +.
• Mobile networks automatically route international calls when the correct country code follows the +.
• Mobile calls may use your domestic minutes or incur international charges if you call through your cellular carrier rather than a VoIP app.
• If you’re traveling, turn off cellular roaming or use WiFi calling to avoid high roaming charges.

Using a landline

• Dial the international exit code first: 011 from the US, 00 from India.
• Add the destination country code (91 for India, 1 for the US).
• Then dial the destination area code and local number.
• Landline carriers typically bill by minute and may apply connection fees. Check rates with your carrier before calling.

Dialing from special phones (office PBX, payphones)

• Office phone systems and payphones may require different access codes. Ask your IT administrator or the phone operator for the required international access sequence.
• Some corporate PBX systems require you to dial 9 then 011 then the rest. Test a short call first.

Tips for both

• Always omit the leading 0 in Indian area codes when calling from abroad.
• Use the + format on mobile devices whenever possible — it works across country borders and carriers.
• Save frequently dialed international numbers in your phone using the +countrycode format so you never have to remember the exact sequence.

Cheapest Ways to Call Between Countries

Cost matters when you place frequent international calls between the USA and India. Here are practical ways to lower your bill.

1. VoIP apps and internet calling

• VoIP apps that call real phone numbers often offer the lowest per-minute rates. Many let you call India from the USA or the US from India over WiFi or mobile data.
• Example cost context: Telvio charges from $0.02/min to the US and about $0.08/min to India, bills by the second, and has no connection fees. Credit packs start at $1.99.
• Free internet-to-internet voice calls (WhatsApp, FaceTime, Skype-to-Skype) avoid carrier minutes entirely but only work when both sides use the same app.

2. WiFi calling and calling cards

• Use WiFi whenever possible to avoid cellular roaming and international minute charges.
• International calling cards still offer competitive rates if you prefer dialing a local access number. Compare effective per-minute rates and connection fees carefully.

3. Mobile carrier international plans

• If you call infrequently, your carrier’s pay-per-minute international rate might be acceptable. If you call regularly, evaluate add-on international plans or bundles.
• Remember that carrier rates often include connection fees and per-minute rounding. Look for per-second billing if you want to pay for actual talk time.

4. Virtual numbers and callback services

• Acquire a virtual local number in the country you call most often. Callers dial a local number that forwards to you. This method helps inbound callers avoid international charges.
• Callback services connect two parties by dialing each side and bridging the call. They can be cheap but sometimes add complexity.

5. Free or low-cost internet options

• For friends and family who both have good internet, use free options like WhatsApp, FaceTime, Telegram voice calls, or video platforms. See our guide to free online video calling platforms for options and pros/cons: Free Video Calling Sites.

Practical savings example

• Caller A in the USA needs to call India for 30 minutes per month. At a typical carrier rate of $0.50/min, that costs $15. Using a VoIP app with a rate of $0.08/min lowers the cost to $2.40 — an 84% saving. If the app bills per second, you pay precisely for talk time, not rounded minutes.

Compare the total cost, not just the per-minute rate. Account for connection fees, rounding rules, and whether both parties must have the same app.

Mobile Apps and VoIP Solutions

Apps and VoIP services make international calling straightforward and inexpensive. Here’s how to choose and use them.

Types of services

• App-to-app voice: Free if both people use the same app (WhatsApp, FaceTime, Telegram). Requires a data connection on both sides.
• App-to-phone-number VoIP: Lets you call regular landlines and mobiles. These solutions charge low per-minute rates and often offer pay-as-you-go credits or subscriptions.
• Virtual number services: Provide a local number in the country you call most often so your contacts call a local number and you pick up internationally.

Popular apps and what to expect

• WhatsApp/FaceTime/Telegram: Free app-to-app calling over data. No charges to call another user, but quality depends on the internet connection.
• Skype: App-to-app calls are free; calling real phone numbers costs per-minute fees and often requires Skype Credit or a subscription.
• Google Voice: Offers US numbers and competitive international rates but has limited availability for non-US users.
• Telvio: A mobile VoIP app that calls real phone numbers in 200+ countries. No account required, per-second billing, credits that never expire, and a free minute on first install. Rates start at $0.02/min to the US and about $0.08/min to India. See more on VoIP phone services in our explainer: Best VoIP Phone Systems.
• Other low-cost VoIP providers: Rebtel, Vonage Mobile, and others offer similar features; compare rates, billing granularity, and whether they require registration.

How to use a VoIP app to call a phone number

1. Install the app on your iPhone or Android device.
2. Purchase credits or a monthly plan when needed.
3. Enter the phone number in international format: +country code, area code, local number.
4. Tap call. The app uses your WiFi or mobile data to place the call to the destination phone number.

When to use VoIP versus app-to-app

• Use app-to-app when both parties have the same app and you want a free call.
• Use VoIP app-to-phone when the person you need to reach does not use the same app or when you must call landlines (doctors’ offices, businesses, government numbers).

Security and privacy

• Choose apps that use encryption for voice traffic. Read the app’s privacy policy if you share sensitive information.
• For business calls, consider providers that offer guaranteed call quality and support.

Additional resources

• If you want a virtual number for inbound calls, check our virtual phone numbers guide: Virtual Phone Numbers Guide and our guide on free virtual phone numbers: Virtual Phone Numbers SMS.
• For a broader overview of international calling methods, see Make International Calls.

Common Mistakes to Avoid

Avoiding these common mistakes will reduce failed calls, unexpected charges, and frustration.

1. Forgetting the country code or using the wrong one

• Always include +91 for India or +1 for the USA. Not including the country code can route the call locally or fail.

2. Leaving India’s leading 0 in the area code

• When dialing from the US to an Indian landline, omit the 0 in area codes. For example, dial +91 11 2345 6789 for Delhi, not +91 011 2345 6789.

3. Using local trunk prefixes incorrectly

• Trunk prefixes (like 0 in India) are for domestic calls only. Replace them with the country code when calling internationally.

4. Assuming all international numbers use the same format

• India’s mobile numbers are 10 digits (no leading 0 when used with +91). US numbers have a 3-digit area code + 7-digit number. Know the pattern of the number you call.

5. Not checking time zone differences

• India is typically 9.5 to 13.5 hours ahead of US time zones depending on DST. Call at considerate times to avoid waking or interrupting the other person.

6. Forgetting roaming and data costs

• When traveling, turn off cellular roaming or use WiFi and VoIP apps to avoid high data charges from your mobile carrier.

7. Ignoring billing details

• Check whether your carrier or app applies connection fees, per-minute rounding, or minimum charges. Per-second billing (as offered by some VoIP apps) can save money on short calls.

8. Expecting toll-free numbers to be free internationally

• Toll-free US numbers often do not accept international calls or may be billed differently. Test before assuming they work from India.

9. Not confirming whether the person has a smartphone or landline

• If they only have a landline, app-to-app calling won’t work. Use a VoIP app that calls real phone numbers.

10. Using low-quality public WiFi without checking security

• Public WiFi may drop calls or expose data. Use a secure network when possible and avoid sharing sensitive information on unsecured public networks.

Checklist before calling

• Confirm the full number in international format (+countrycode..).
• Check local time at the destination.
• Verify available calling option (app-to-app, VoIP-to-phone, or carrier).
• Test a short 1–2 minute call first to verify clarity and billing.