“I am moving to the USA for a master's program and have an Indian Airtel SIM linked to my bank OTPs and government docs. Can I still receive SMS messages on it in the US, and what is the best way to keep it active?”
Your Indian number can remain your OTP line while you use a separate US line for everyday data and calls. The manageable part is doing the activation before departure and setting reminders for validity and activity.
Your best route depends on whether the Airtel line is prepaid or postpaid and how much certainty you want for bank OTPs.
Before leaving India, activate an in the Airtel App, by calling 121, or by texting IRSTART to 121. Airtel’s OTP-specific guide says the pack enables OTPs and bank messages abroad and says both prepaid and postpaid customers must activate one; this is the safest route for your bank-linked number.
Airtel’s separate activation guide says prepaid users can maintain sufficient balance with either an or talk-time recharge, and its USA standard tariff charges ₹0 for incoming SMS. This is the lower-cost reading, but it conflicts with Airtel’s OTP-specific page, so use it only if you accept that service-policy risk.
Activate international roaming and continue paying the monthly bill. TRAI expressly counts payment of postpaid rental as activity, and Airtel’s USA standard tariff lists incoming SMS at ₹0; avoid calls and Airtel data unless covered by a pack.
Because Airtel’s two May 22, 2026 pages conflict, the OTP-specific pack instruction is the conservative rule to follow for a number tied to money and identity records.
These steps keep the Airtel number registered, usable for incoming SMS, and protected from prepaid inactivity while you study in the USA.
Before your flight
Activate international roaming before leaving India
In the Airtel App, toggle on international roaming; alternatively, text IRSTART to 121 or call 121 while in India. Airtel also lists +91-99100-99100 for activation from outside India. Turn international roaming on in the phone’s line settings as well.
Requirements
Before departure
Choose the prepaid or postpaid route
If prepaid and your bank access is critical, use Airtel’s app flow—enter the mobile number, choose a USA roaming pack, and let it auto-activate on landing. Airtel’s exact current 365-day checkout price is unresolved, so do not rely on the older ₹4,000 table. If postpaid, enable international roaming and continue paying the bill; TRAI counts rental payment as activity.
Requirements
Throughout your program
Create one qualifying prepaid activity every 80 days
Do not rely only on incoming OTPs because incoming SMS is absent from TRAI’s and Airtel’s activity lists. Send one ordinary outgoing SMS before each 90-day point; without a pack, Airtel’s USA standard rate is ₹25 per outgoing SMS. Also renew before it expires and keep more than ₹20 in the main balance if you want Airtel’s ₹20-per-30-day as a backup.
Requirements
After landing
Use the Airtel line only for SMS unless covered
Leave the Airtel line switched on so it can register and receive SMS, but set the US line as the cellular-data default and disable cellular data on Airtel. At standard USA rates, Airtel lists incoming SMS ₹0, outgoing SMS ₹25, incoming calls ₹100/minute, calls to India ₹180/minute, and data ₹6.50 per 10 KB.
Requirements
Before departure and after landing
Test messages and save the roaming support number
Request a real test OTP from each important account before flying and repeat after the Airtel line registers in the USA. If it does not register, Airtel recommends manually selecting another available network, restarting the phone, or toggling airplane mode; its IR page lists 24/7 call/WhatsApp support at 9910099100.
Requirements
You are not the first to go through this. Here is how it went for others who asked the same thing.
u/mybutterflymonr/nriMay 20, 2026
u/Clandestine_313r/nriSep 28, 2025
u/Legitimate-War5885r/nriAug 10, 2026
The answer comes from Airtel’s own roaming guides, USA tariff and prepaid terms, plus TRAI’s official non-use regulation; the third-party report is used only to expose the price conflict.
Airtel Keep-SIM-Active Guide
Airtel says an international-roaming pack supports OTP and bank-message reception abroad and, in this dedicated guide, calls a pack mandatory.
Activating an International Roaming pack on your SIM card is crucial – as it helps you to receive calls on your phone, use mobile data, getting OTPs and bank messages even when you are abroad. However, whether you’re a prepaid or a Postpaid customer, you must activate an international roaming pack whenever you travel abroad.
Airtel IR Activation Guide
Airtel’s separate activation guide permits prepaid users to maintain balance with either a roaming pack or talk-time recharge, creating the stated policy conflict.
Disclaimer: Prepaid customers need to maintain sufficient balance along with activating IR service to use International Roaming while abroad. The balance can be maintained either by buying a separate IR pack or a talk time recharge to keep their prepaid sim active abroad. Additionally, ensure the international roaming is switched on your phone for the IR service.
Airtel International Roaming Standard Charges
Reading the USA row against the table headings establishes ₹0 incoming SMS, ₹25 outgoing SMS, ₹100/minute incoming calls, ₹180/minute calls to India, and ₹6.50 per 10 KB data at standard rates.
USA row
Country Name Set Local Call (Rs./min.) Call To India (Rs./min.) Incoming Calls (Rs./min.) International Calls (Rs./min) SMS Outgoing (Rs./sms) SMS Incoming (Rs./sms) Data (Rs./10Kb) USA Set 1 50 180 100 200 25 0 6.5
Airtel SUK Plan / PV 128 Terms
Airtel defines inactivity, the 90-day point, its ₹20 retention deduction, and the 15-day recovery window for this prepaid plan.
Non-usage terms
The mobile connection will be deactivated if there is no voice/ video call (outgoing or incoming) or an outgoing SMS or a data session (upload or download) or usage of Value Added Services, for a continuous period of 90 days and in case the main account balance is less than Rs. 20/-, at the discretion of Airtel. Upon deactivation, all account balances will be forfeited and a grace period of 15 days will be provided within which the subscriber can retain the deactivated number by paying a fee of Rs. 20/-. If the subscriber main account balance is Rs. 20/- or more, a number retention charge of Rs. 20/- for every 30 days will be automatically deducted and the non-usage period will be extended by 30 days.
Airtel SUK Plan / PV 128 Terms
For the cited prepaid plan, balance-based number retention is separate from the recharge needed to keep services usable.
Tariff-validity terms
It is mandatory to do a recharge with a voucher of Minimum Rs. 128 or above to avail services post tariff validity period. In case of non-recharge with a voucher of Minimum Rs. 128 or above post the grace period, all the services will be suspended.
TRAI Deactivation Regulation, Press Release No. 12/2013
TRAI supplies the nationwide floor for non-use deactivation, what counts as activity, balance protection, and reactivation time.
Press Release No. 12/2013
The mobile connections of prepaid consumers shall not be deactivated for any period of non-usage less than 90 days; For the purpose of usage, a voice call/ video call (incoming or outgoing) or an outgoing SMS or a data usage or usage of Value Added Services, or payment of rental (in case of post paid connection) etc. shall definitely fall in the scope of activity, the service provider may prescribe any other activity as well; There shall be no deactivation if the balance in prepaid consumer account is Rs.20/- or more; An ‘Automatic Number Retention Scheme’ shall be implemented for prepaid consumers on payment of reasonable charges; A consumer whose connection is deactivated shall be given a grace period of 15 days within which he can reactivate the same number;
TelecomTalk report
This non-authoritative report documents the price mismatch; it is used only to flag the unresolved annual-pack price, not to establish Airtel service rules.
Headline
Tariff Hike 2026: Airtel Raises Prepaid Global Pack Price from Rs 4000 to Rs 4999
These are the official Airtel and TRAI rules as published on the cited dates; plans, prices, partner networks, and rules can change.
This is general information about official processes, not legal advice, and SettleKit is not a law firm.
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