Your account isn’t lost yet — Telegram’s actual inactivity window is longer than most people assume, and you have several real recovery paths given you can prove ownership. 
Correcting the Timeline First
WHAT YOU FEARED:
──────────────────────────────────────────────
✖ 1 year (or less) → total data wipe
WHAT'S ACTUALLY TRUE:
✔ Default self-destruct period = 18 months
(changed from the older 6-month default)
✔ User-adjustable between 1–12 months,
but only if YOU set it manually
✔ Since you never touched this setting,
you're almost certainly on the 18-month
default clock
Telegram’s default self-destruct period is 18 months, not 1 year, unless the user manually shortened it [1][2].
The Clock Starts From Last Login — Not SIM Deactivation
CRITICAL DISTINCTION:
──────────────────────────────────────────────
Countdown begins: Last actual login/activity
Countdown does NOT begin: Date your SIM
was deactivated
ACTION:
→ Recall your last login date
→ That is your real deadline, likely
further away than you think
The inactivity countdown is tied strictly to last login/activity, giving you more breathing room than the SIM deactivation date alone suggests [1].
Your Recovery Options — Ranked by Speed
Check for Any Still-Logged-In Device
CHECK: Old phone, tablet,
desktop app, Telegram Web
IF FOUND:
→ Settings → Edit Profile → Phone Number
→ Change to a number you currently control
→ Instantly solves everything, no SIM
or ISP wait needed
If Telegram remains logged in on any other device, you can change the linked phone number directly without needing the old SIM [3].
Check for a Linked Recovery Email
ON LOGIN SCREEN:
→ Tap "Need help logging in?"
IF PREVIOUSLY SET UP UNDER:
Settings → Privacy & Security → Login Email
→ Code may be sent to email instead of SMS
LIMITATION:
→ Only works if configured BEFORE
losing SIM access
A pre-configured login email can allow Telegram to send the verification code via email instead of SMS [4].
Contact Telegram Support Directly
GO TO: telegram.org/support
INCLUDE IN TICKET:
→ SIM was deactivated by carrier for
non-recharge, not voluntary abandonment
→ You are actively trying to reclaim
the number
→ Ownership proof: old chat screenshots,
account creation date, linked email,
Telegram Premium/Stars purchase history,
mutual contacts, known user ID
NOTE:
→ Support cannot bypass the phone number
requirement for security reasons
→ BUT a documented ticket filed BEFORE
the inactivity deadline strengthens
your case
Telegram support cannot override the phone number requirement for security reasons, but can offer guidance based on documented login history and ownership proof [4].
Push Your ISP for a Firm Timeline
CURRENT RESPONSE: "We'll tell you when
it's available" (vague)
PUSH BACK WITH:
→ Ask for exact quarantine period before
number reassignment (often 60–90 days)
→ Ask if paying the recharge/reconnection
fee NOW can expedite reactivation
→ Escalate to a supervisor or formal
telecom complaints channel if available
Recovery Scenario Outcomes
 Scenario |
 Outcome |
| Number recovered within 18 months of last login |
Full account access restored via SMS code |
| Different new number obtained before 18 months |
Won’t help directly — use email/session recovery instead [4] |
| 18 months pass with no login and no number recovery |
Account and data permanently wiped [1] |
Immediate Action Checklist
Check every old device for a still-active Telegram session — this alone can resolve it in minutes
Submit a Telegram support ticket today with your ownership proof, don’t wait for the ISP
Return to your ISP and ask specifically for their quarantine period and reactivation-by-payment option
Calculate your real deadline using your last login date, not the SIM deactivation date
Once recovered, immediately set up a login email under Privacy & Security to prevent this exact situation in the future
Given you can prove ownership and the default window is 18 months (not 1 year), your account has a real chance of recovery — prioritize checking logged-in devices and filing a Telegram support ticket now while pushing your ISP for a firm number-reassignment timeline. 
!