Short answer: On Metro by T-Mobile, your number is at risk after about 120 days unpaid (it follows T-Mobile prepaid). After the unpaid window the account is cancelled and the number is reassigned. CONFIRM

How long you have on Metro by T-Mobile

That Metro by T-Mobile SIM you forgot about can stop being yours sooner than you'd think. On Metro by T-Mobile, the number is at risk after about 120 days unpaid (it follows T-Mobile prepaid). Metro's own terms don't publish an exact day count; it runs under T-Mobile's prepaid policy, so treat 120 days as a guide and confirm with Metro. This figure comes from a secondary source or isn't published as an exact day count by the carrier, so confirm it directly before relying on it.

Can you get your Metro by T-Mobile number back?

Pay before the unpaid window closes to keep the number. After the unpaid window the account is cancelled and the number is reassigned. Once a number has been released to the pool and reassigned to someone else, it's gone for good.

What counts as keeping it active

Comparing carriers? See the full prepaid expiration policies table for the US, UK, Australia and Canada.

Don't lose your Metro by T-Mobile number by accident

KeepSim gives this line its own countdown, warns you on your Home Screen before the deadline, and lets you fire a keep-alive action in one tap. Local-first, no account.

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Common questions

How long before Metro by T-Mobile recycles your number?

On Metro by T-Mobile, your number is at risk after about 120 days unpaid (it follows T-Mobile prepaid). After the unpaid window the account is cancelled and the number is reassigned.

Can you get your Metro by T-Mobile number back?

Pay before the unpaid window closes to keep the number. Once the number has been released and reassigned, getting it back is almost never possible.

Does using WhatsApp keep the number active?

Usually no. WhatsApp, iMessage and similar apps run over data or Wi-Fi and don't count as carrier activity. You typically need a billable call, text, paid data, or a top-up.

Last verified June 2026 against T-Mobile official support (Metro is a T-Mobile prepaid brand). This figure comes from a secondary source or isn't published as an exact day count by the carrier, so confirm it directly before relying on it. Carrier policies change often and depend on your exact plan and country — treat this as a starting point, not legal advice, and confirm the current rule with Metro by T-Mobile before relying on it. KeepSim is a personal reminder tool; it does not provide telecom service or keep numbers active on your behalf.