India operates on GSM 900 and 1800 MHz bands with 3G on 2100 MHz and 4G LTE on bands 3, 5, and 40 as primary deployment frequencies. The country rolled out 5G networks in October 2022 across major urban centers including New Delhi, Mumbai, Kolkata, Chennai, and Bangalore through operators Reliance Jio and Bharti Airtel. The Telecom Regulatory Authority of India reports 1.17 billion wireless subscribers as of December 2023 with nationwide mobile penetration at 84 percent of the population. Network infrastructure reaches all district headquarters and covers approximately 95 percent of inhabited land area with 2G voice service and 89 percent with 4G data service according to Department of Telecommunications coverage maps updated in 2023.
Foreign nationals purchasing prepaid SIM cards face mandatory biometric verification under Prevention of Money Laundering Act regulations enforced since 2017. This requires a passport-size photograph, passport copy showing visa stamp, proof of local address in India, and in-person registration with fingerprint and facial photograph capture at the point of sale. The local address requirement accepts hotel booking confirmations for stays exceeding 30 days, registered rental agreements, or a letter from an Indian citizen sponsor with their own identity documents attached. Activation completes within 4 to 24 hours after document submission to operator backend systems. Tourist SIM cards marketed at airports function under the same regulatory framework and require identical documentation despite promotional language suggesting simplified processes.
Reliance Jio holds 40.8 percent market share followed by Bharti Airtel at 35.1 percent and Vodafone Idea at 18.4 percent based on subscriber data from January 2024. State-owned BSNL retains 8.9 percent and operates the only network infrastructure in certain border districts of Jammu and Kashmir, Ladakh, Arunachal Pradesh, and Andaman and Nicobar Islands where private operators lack towers. Jio offers prepaid plans starting at 179 rupees for 28 days with 2 gigabytes daily data and unlimited domestic voice calls. Airtel's comparable entry plan costs 199 rupees for identical validity with 2 gigabytes daily allocation. Both include free roaming across all 28 states and 8 union territories without additional charges. Vodafone Idea maintains similar pricing at 181 rupees for 28 days. All three operators throttle data speeds to 64 kilobits per second after the daily high-speed quota exhausts until midnight reset.
Long-term plans extend to 365-day validity with offerings such as Jio's 2999 rupee annual plan providing 2.5 gigabytes daily data totaling 912 gigabytes over the year with unlimited voice. Airtel's equivalent costs 3359 rupees for 2 gigabytes daily across 365 days. These plans do not permit international calling in base configuration and require separate international calling packs purchased as add-ons. International roaming for outbound travel from India activates as an opt-in service with per-country rate cards published on operator websites. Incoming international roaming for foreign SIM cards operates without restriction on compatible frequency bands.
Physical SIM cards remain the standard distribution format with eSIM technology available only from Airtel and Jio for postpaid customers holding valid long-term residence permits or Indian citizenship as of March 2024. Prepaid eSIM services do not exist for short-term visitors. SIM card sizes come in standard, micro, and nano formats provided as triple-cut cards that punch down to required dimensions. Retailers stock all sizes and replacement costs 20 rupees at company-owned stores.
Purchase locations include airport counters at Indira Gandhi International Airport in New Delhi, Chhatrapati Shivaji Maharaj International Airport in Mumbai, Kempegowda International Airport in Bangalore, and Chennai International Airport operating 24 hours in international arrival halls. City retail availability spans company-owned branded stores, multi-brand mobile retailers, and authorized dealer franchises displaying operator logos. Informal roadside vendors cannot legally activate new connections under Know Your Customer regulations enforced through operator compliance departments. All sales require point-of-sale system entries linked to the national telecom database maintained by Department of Telecommunications.
Data speeds on 4G networks measure between 8 and 15 megabits per second download in urban centers during off-peak hours based on Telecom Regulatory Authority testing conducted across 50 cities in 2023. Peak hour speeds between 6 PM and 10 PM drop to 3 to 7 megabits per second in metro areas. Jio demonstrates median speeds of 18.5 megabits per second download and 5.2 megabits per second upload while Airtel records 14.3 megabits per second download and 4.1 megabits per second upload according to Ookla data from January 2024. Rural tower density averages one site per 8.4 square kilometers producing intermittent connectivity in agricultural zones of Uttar Pradesh, Bihar, and Madhya Pradesh plains.
Himalayan regions above 2500 meters elevation experience fragmented coverage with BSNL providing the only service along national highways in Ladakh including the Leh-Manali route and Srinagar-Leh route. Private operators maintain towers in Shimla, Manali, Dharamshala, Rishikesh, and Nainital but coverage gaps occur between towns. The Spiti Valley, Zanskar Valley, and areas north of Keylong lack cellular service except at specific military installation peripheries where signal spillover occurs. Trekking routes to Kedarnath, Badrinath, Valley of Flowers, and Hemis National Park have no coverage beyond base villages.
The Andaman and Nicobar Islands receive service only from BSNL with 2G coverage on Port Blair, Havelock Island now officially named Swaraj Dweep, and Neil Island now named Shaheed Dweep. Northern islands including Interview Island, Landfall Island, and the entire Nicobar group below Car Nicobar have no commercial cellular infrastructure. Lakshadweep Islands operate BSNL 2G service on Kavaratti, Agatti, and Amini islands exclusively.
Top-up recharges execute through operator mobile applications, third-party aggregators including Paytm and PhonePe, physical recharge vouchers sold at retailers, or USSD codes dialed as star-digit sequences published in plan documentation. Automatic payment methods require Indian bank accounts or UPI addresses which foreign visitors cannot obtain for stays under 182 days per Reserve Bank of India regulations on non-resident banking. Credit cards issued outside India process through payment gateways on operator websites and apps with acceptance rates varying by issuing country. Cards from the United States, United Kingdom, and European Union process reliably while others may decline without explanation.
Data rollover does not exist on any operator's prepaid plans. Unused daily quotas expire at midnight without accumulation to subsequent days. Plan validity extensions without data additions can be purchased separately at rates of 49 rupees for 28 days on Jio and 45 rupees for 28 days on Airtel, maintaining the number active when traveling outside India without consuming bundled data. These validity vouchers do not include talk time, SMS, or data but prevent number deactivation during the extension period.
Tethering and hotspot functionality operates without restriction on all prepaid plans with the daily data quota shared across all connected devices. Operators do not implement separate tethering limits or throttling based on connection type. Video streaming services detect mobile network origins and default to 480p resolution on most plans with 720p available when network speeds exceed 10 megabits per second sustained.
Jammu and Kashmir and Ladakh union territories experienced internet shutdowns totaling 552 days between August 2019 and February 2021 under Section 5 of the Indian Telegraph Act with subsequent intermittent suspensions during specific events. The Ministry of Home Affairs maintains authority to direct telecommunications suspension in areas under the Temporary Suspension of Telecom Services Rules 2017. Travelers to these regions should verify current connectivity status through Ministry of Home Affairs public notices before depending on mobile data for navigation or communication.
SIM card registration links to passport numbers in the national database and termination of service when exiting India does not occur automatically. Numbers remain active for the purchased plan duration regardless of physical location. Visitors departing before plan expiry retain active numbers that can receive SMS and calls if roaming activates on the foreign network, though incoming charges apply per the visited country's roaming agreements with Indian operators.
- [Operator information: official websites airtel.in, jio.com, and vi.com for current prepaid plan pricing and coverage maps]
- [5G deployment: Department of Telecommunications dot.gov.in for spectrum allocation and rollout timelines]