Check Remaining Internet on Türk Telekom: SMS 3997 and Official Methods
Independent guide — no official affiliation with com.tr.
Short answer
Text 'KALAN' to 3997 to see your remaining Türk Telekom data, use the USSD inquiry menu, or open the usage screen in the TT Mobil / Türk Telekom Online İşlemler app. On postpaid lines the e-bill panel and 444 1 999 call center are also official channels.
Official page
turktelekom.com.tr
01 — Step-by-step fix
Step-by-step fix
ADIM 01
Text 'KALAN' to 3997
Set 3997 as the recipient in your messaging app, type KALAN and send. The reply lists your remaining data, minutes and texts. This is the standard channel especially on TT Mobil prepaid lines.
ADIM 02
Use the USSD menu
Dial the inquiry menu for your line from the phone app (on prepaid, *135# opens the balance and package menu). Choose 'Package Inquiry' from the options; your remaining allowances arrive in one reply.
ADIM 03
Check the TT Mobil / Online İşlemler app
Open the TT Mobil app (prepaid) or Türk Telekom Online İşlemler (postpaid) and sign in with your number. The usage page shows remaining data in GB with a percentage bar, plus the renewal date and billing day.
On postpaid, the 'e-Fatura' panel breaks usage down day by day for the cycle; the package renewal date is shown there too.
ADIM 04
Verify with the call center
Call 444 1 999 and choose 'Tariff and Package Inquiry' in the voice menu. After owner verification your allowances are read out — the reliable fallback when SMS fails.
ADIM 05
Act before the package runs out
The operator sends a warning SMS when data drops below 20%. At that point buy an add-on in the app or enable auto-renewal to avoid TL-based metering at the end of the month.
02 — Frequently asked questions
Frequently asked questions
What is the Türk Telekom remaining-data code?
Text KALAN to 3997 — the official inquiry method on both prepaid and postpaid lines. The USSD menu and the TT Mobil / Online İşlemler apps are free alternatives.
Does texting 3997 cost anything?
No, package and usage inquiry texts are free within Türkiye. International roaming may apply standard SMS charges; prefer the app while abroad.
Do postpaid allowances reset on the billing day?
Yes, your tariff renews on the billing cut-off date. You can see that date on the app's usage page or in the e-bill summary.
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