GO! — not the old Frii
GO! is included in the current prepaid offer. *101# is documented for balance and account term; top-up uses the 14-digit voucher. Frii is closed by official announcement, so its old commands are not offered here. For the rest of the packages, open Mój T-Mobile: the full tariff PDF contains a scan, and the disputed lines are not transferred without checking.
How to send a command safely
- Find the exact name of the offer in the operator's app, contract, or purchase receipt. Select your service type and rate below.
- Open the "Phone" app, select the desired SIM with two numbers and enter the code in full. In the templates, replace TELEKOD, KOD or number with your values - you do not need to send words.
- Press the call and wait for the answer. For the connection command, first read the price, duration and renewal rules.
- Do not send the paid command again if the confirmation is delayed: check the active services in the cabinet.
T-Mobile commands by tariff
Documentary verification: . These commands have not been tested on a SIM card.
GO! — current prepayment. Frii is closed by official announcement 2023. Historic MIXs are not declared closed on the basis of another prepayment report.
No confirmed commands are available for this tariff. Check its official document or customer account.
Frii · Prepaid
Discontinued. Official tariff document ↗ · 11.10.2026
Official closure announcement; previous codes are not assigned here.
No confirmed USSD commands have been found for this tariff range yet. This does not mean USSD is unsupported.
GO! · Prepaid
Available to new customers. Official tariff document ↗ · 11.10.2026
USSD commands
| Command | Purpose | Compatibility, cost and restrictions |
|---|---|---|
*101# | Account balance and expiry date | Documented Value not specified in sourceSource ↗ · |
*111*14-CYFROWY_KOD_UZUPEŁNIAJĄCY# | Top up with a 14-digit voucher Caution: Changes services. Check the terms before sending a command. | Documented Value not specified in sourceSource ↗ · |
If the command did not work
Check the selected SIM, the accuracy of the characters, the number registration and the network access. The error message does not prove that the service is not supported: the reason may be a different tariff generation, an unavailable package or a temporary failure. Save the text of the reply without personal data and check the terms of your offer in the cabinet. Do not replace the code with a random command from another operator.
Why does the table not show *108# for Internet balance?
The official blog and the tariff document give a different description of this command. Until we have checked the exact generation, we do not give one interpretation as guaranteed; the rest of the package can be viewed in My T-Mobile.
Completeness and official sources
GO! — current prepayment. Frii is closed by official announcement 2023. Historic MIXs are not declared closed on the basis of another prepayment report.
*108# is ambiguous between the blog and the tariff PDF: not published without comparison. Document GO! – scan, text loading incomplete. The full matrix of contracts, MIX, Internet and business generations is not complete.
Date of documentary verification: 11.10.2026. Lack of confirmation does not mean incompatibility. An archive document does not in itself prove the continued service of a tariff.