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What is Special Tariff Voucher (STV)?

Special Tariff Voucher

A Special Tariff Voucher, or STV, changes specified voice, SMS or data benefits under a mobile subscriber’s applicable tariff plan without adding monetary value to the prepaid balance. Its benefits and validity depend on the voucher offered. An STV should not be confused with a talktime top-up or assumed to extend every aspect of the connection’s validity.

Definition and naming: see official sources
In this explanation

What an STV changes

A customer may want a particular calling, messaging or data benefit. An STV changes the relevant tariff benefit for its stated scope and period. It is a category of voucher, not one fixed plan sold by every operator.

TRAI’s consolidated Telecom Consumers Protection Regulations define STV and distinguish it from other voucher types. The important distinction is that an STV supplies the stated tariff benefits without adding monetary value to the prepaid account.

Read the operator’s description of the actual product. A familiar price does not tell you whether the voucher adds data, voice benefits, SMS benefits or something else within its stated terms.

STV, top-up, plan voucher and combo voucher

Voucher typeMain distinction
Special Tariff VoucherChanges specified tariff benefits without adding monetary value
Top-up voucherAdds monetary value to the prepaid account
Plan voucherEnrols the consumer into a tariff plan
Combo voucherCombines tariff changes with monetary value

The categories help explain why a successful recharge may not produce the balance a customer expected. A benefit pack can be correctly activated without creating an equivalent rupee talktime balance.

Operator marketing names can be different from the regulatory category. Use the actual benefit description instead of deciding from words such as “smart,” “value” or “unlimited.”

Validity needs its own check

Ask when the voucher’s benefits begin and end, whether it requires an eligible existing plan, and what happens when the included benefit is exhausted. Check the operator’s current terms for that particular recharge.

Do not promise that a data benefit automatically extends the connection’s service validity. Likewise, an existing monetary balance does not prove that the required service benefit is active.

The TRAI regulation’s voucher-information provisions make the applicable plan, tariff and validity information relevant. The customer needs the terms of the selected product, not a generic assurance that all recharges work the same way.

Questions to settle at the recharge counter

Confirm the mobile number and operator, then ask what the customer needs: outgoing calls, data, SMS, monetary balance or continued service. Match the actual requirement with the current product information.

Before payment, explain the selected benefit and its duration in ordinary language. If the product is an add-on, make that dependency clear. Do not select a pack only because its amount matches the money handed over.

Keep the recharge reference and check the final result. If the customer reports a problem, distinguish a failed recharge from a successful recharge whose benefits were misunderstood. Those questions require different evidence.

An example: data benefit versus talktime

Illustrative example: A customer asks for “balance” but actually wants to make calls after their current benefits end. The retailer sees a data-focused voucher at a similar price.

Buying that voucher without clarification could leave the customer with a benefit they did not request. The better approach is to identify the calling requirement and check the operator’s suitable current product before proceeding.

SiOnline’s retailer service information concerns access to relevant services. The mobile operator determines the recharge product’s benefits and terms; a retailer does not create them by describing the voucher differently.

Questions about STVs

Does an STV always add talktime?

No. An STV does not add monetary value under the regulatory definition. Read the benefits of the actual voucher.

Does every STV have the same validity?

No. Check the period stated for the particular product rather than copying another voucher’s duration.

Is an operator’s pack name enough to identify it?

No. Read the included benefits, applicability and validity. Marketing names alone can hide important differences between products.

Sources and editorial notes

Checked 12 November 2026

This explanation uses the following published sources. Check the responsible authority’s current guidance before acting on a requirement.

  1. TRAI’s consolidated Telecom Consumers Protection Regulations

    Supports the linked explanation above. Provider-specific examples and dated guidance are identified in the article.

Written by the SiOnline Team. Read our editorial approach or report a correction.

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