5G Data
High-speed mobile data delivered over an operator's 5G network, included at no extra cost on most current Airtel, Jio, and Vi plans in covered areas.
Recharge Plan Glossary: Telecom Terms Explained
5
5G NSA (Non-Standalone)
5G NSA stands for 5G Non-Standalone. It anchors 5G radio to an existing 4G LTE core. Airtel's initial 5G Plus rollout in India used NSA before moving toward SA. NSA phones connect to 4G for control signalling and use 5G for data.
5G SA (Standalone)
5G SA stands for 5G Standalone. It is a 5G network that uses a dedicated 5G core, separate from 4G. Jio rolled out a true SA network in India, which enables lower latency and features like network slicing and improved battery efficiency on supported handsets.
Annual Recharge Plan
A prepaid plan with a validity of 300 days or more, designed for users who prefer a single yearly recharge over monthly top-ups.
APN (Access Point Name)
APN is the gateway name your phone uses to connect to the mobile operator's data network. Each operator publishes its own APN, for example jionet for Jio or airtelgprs.com for Airtel. APN is usually set automatically on Indian SIMs, but may need manual entry after an eSIM transfer.
Auto Recharge
Auto Recharge is a saved instruction that recharges your prepaid number automatically when validity is about to expire or balance runs low. Jio, Airtel, and Vi offer this through their apps using UPI mandates so the same plan renews without manual action.
Carry Forward Data
Carry Forward Data is unused daily data that moves to the next day under select plans. Most Indian operators do not carry daily data forward by default. Jio's data rollover, Airtel's data carry-forward on specific packs, and Vi's data delight let leftover data accumulate up to a stated cap.
Circle Roaming
Circle Roaming applies when you travel from your home telecom circle to another circle inside India. Since 2015 TRAI's One Nation Free Roaming rules have removed extra roaming charges on most prepaid and postpaid plans, but some MTNL or BSNL packs still mention roaming bundles separately.
CNAP (Calling Name Presentation)
CNAP is a TRAI-mandated service that shows the verified KYC name of an incoming caller on your screen, instead of just the number. Indian operators began rolling out CNAP in 2024 to help users identify spam and unknown callers without third-party apps.
Combo Pack
A recharge plan that bundles data, voice calls, and SMS benefits together in a single price, instead of offering each separately.
Daily Data Limit
The amount of high-speed data available each day under a plan, after which speed may be reduced until the next day's allowance resets.
Data Rollover
A benefit on some plans where unused data from a previous period, such as a weekend, carries forward to the next period instead of being lost.
Data Voucher
An add-on recharge that provides extra data without changing the validity or calling benefits of the user's main active plan.
eSIM
A digital SIM built into a compatible device, allowing users to activate a mobile plan without inserting a physical SIM card.
FUP (Fair Usage Policy)
A limit set by operators on high-speed data or unlimited calls, after which speed is reduced or per-minute charges may apply for the rest of the validity period.
Hello Tune
A short audio clip that plays for callers before a call is answered, offered as a free add-on benefit on several prepaid plans.
IMEI
IMEI is the 15-digit International Mobile Equipment Identity number of your handset. India's CEIR portal uses IMEI to block lost or stolen phones. Dial *#06# to see the IMEI of any device. Each physical SIM slot or eSIM profile has its own IMEI.
IMSI
IMSI is the International Mobile Subscriber Identity stored on your SIM or eSIM profile. The operator uses IMSI to authenticate your line on the network. It is different from the phone number and is never shown to other users.
IUC (Interconnect Usage Charge)
IUC was the per-minute fee operators paid each other for calls landing on rival networks. Jio introduced a temporary IUC top-up in 2019 before TRAI moved to bill-and-keep in 2021, after which IUC charges to end users were withdrawn on most Indian plans.
KYC (Know Your Customer)
KYC is the identity verification required before a SIM is activated in India. Operators collect Aadhaar-based eKYC or self-KYC through their app, along with a live photo. A SIM cannot make calls or use data on the network until KYC is completed.
Latency
Latency is the round-trip time, in milliseconds, for a small packet between your phone and a server. Lower latency helps gaming and video calls. 5G SA networks in India typically show 20–40 ms, while 4G LTE is closer to 40–80 ms on a good signal.
MNP (Mobile Number Portability)
The process that allows a subscriber to switch telecom operators while keeping the same mobile number, subject to a minimum waiting period.
Night Data
Night Data is bonus data, separate from the daily quota, that can only be used during a fixed late-night window, usually 12 AM to 6 AM. Some Jio Cricket Season packs and older Vi night packs bundle night data so heavy downloads do not eat the daily limit.
OTT Benefits
Subscriptions to streaming or entertainment apps, such as JioCinema, Disney+ Hotstar, or Vi Movies and TV, bundled with select recharge plans.
Porting Code (UPC)
UPC is the Unique Porting Code used to switch operators while keeping the same number under MNP. Send PORT <your number> to 1900 to receive a UPC over SMS. The code is valid for four days and must be handed to the new operator at the time of SIM activation.
Postpaid
A mobile plan where users pay after using the service, based on a monthly bill that covers calls, SMS, and data used during the billing cycle.
Prepaid
A mobile plan where users pay in advance for calls, SMS, and data. Recharge is required before the current plan expires to keep the service active.
RCS (Rich Communication Services)
RCS is the successor to SMS. It supports read receipts, typing indicators, group chats, and high-resolution media over your data connection. Google Messages enables RCS by default on Indian Android phones on Jio and Airtel networks.
Roaming
The ability to use mobile services, including calls, SMS, and data, while traveling outside the subscriber's home telecom circle.
SIM Card
A small chip issued by a telecom operator that identifies a subscriber on the network and stores the account information needed for calls, SMS, and data.
SIM Swap
SIM Swap is the process of replacing an existing SIM with a new one for the same number, usually after damage, loss, or upgrade to 5G or eSIM. Indian operators require KYC re-verification and impose a 24-hour cool-down on outgoing SMS to prevent OTP fraud.
Speed Throttling
Speed Throttling is the reduction of data speed after you cross your daily or pack FUP limit. Most Indian unlimited plans throttle the connection to 64 Kbps or 128 Kbps for the rest of the day, which is enough for chat but too slow for streaming.
STD Call
A long-distance call made to a number outside the caller's home telecom circle but within India, typically included in unlimited calling plans.
Talktime
The credit balance available on a prepaid SIM card, used for calls, SMS, or services that are not covered by the active data plan.
Telecom Circle
A geographic licensing area defined by TRAI where a telecom operator is authorized to provide services. India is divided into 22 such circles.
Top-up
A small recharge that adds talktime or data to a prepaid account without extending the validity of the main active plan.
TRAI
The Telecom Regulatory Authority of India, the government body that regulates telecom operators, pricing transparency, and consumer protection rules.
Unlimited Plan
A recharge plan that provides unlimited voice calls across networks, combined with a fixed daily or total data allowance for the validity period.
USSD
USSD is a text menu service accessed by dialing short codes that start with star and end with hash, such as *123# for balance. USSD works without internet on any handset and is widely used in India for balance checks, plan offers, and DND activation.
Validity Period
The number of days during which a recharge plan's benefits, such as data and unlimited calls, remain active before the plan expires.
Voice Pack
A Voice Pack is a recharge meant only for unlimited or large-bucket calling, with little or no data. BSNL and Vi still sell dedicated voice packs for users on basic feature phones or secondary numbers who only need talktime and outgoing minutes.
VoLTE
VoLTE stands for Voice over LTE. It routes calls over the 4G data channel instead of the older 2G or 3G voice channel, giving HD voice quality and faster call setup. Jio launched as a VoLTE-only network, and Airtel and Vi now support VoLTE across India.
VoWiFi (Wi-Fi Calling)
VoWiFi, also marketed as Wi-Fi Calling, lets your phone make and receive regular cellular calls over a Wi-Fi network when mobile signal is weak. Airtel and Jio support VoWiFi on most modern phones, and there is no extra charge — calls are deducted from your regular plan.
Wi-Fi Calling
Wi-Fi Calling is the user-facing name for VoWiFi. When enabled in your phone's settings and supported by your operator, the device automatically hands voice calls between cellular and Wi-Fi to keep the call connected indoors where mobile coverage is patchy.
Related Pages
Continue with telecom circle availability by region, compare recharge plans across providers, or read recharge plan guides.