Open Desktop Authenticator

Steam Guard without a smartphone or phone number

Reviewed by MASTERPANEL LLC 3 min read Sources and testing: The no-number choice is documented in Valve's setup walkthrough. ODA delivery handling was reviewed in its enrolment implementation; email activation is also recorded in a single historical account test on August 10, 2026 Editorial method

A device that runs an authenticator and a phone number used for messages are separate requirements. Valve's app needs a supported Android or iOS device, but its current setup offers a way to continue without a phone number. Email Steam Guard and unofficial desktop authenticators are other routes with different trade-offs.

Choose your situation
  • You need sign-in protection without an authenticator app: consider email Steam Guard. Protect access to the email account; trade and Market conditions differ.
  • You can run Steam Mobile but have no number: use Valve's documented no-number setup option below, and retain the recovery code.
  • You need authenticator codes on a PC: compare the desktop choices. You will manage credentials and backups on that PC; these are third-party clients.
  • You already lost the phone authenticator: use the recovery guide. Installing a desktop app alone cannot retrieve secrets from a lost phone.

Use Steam Mobile without linking a number#

In Valve's setup walkthrough, the number step includes I don't have access to a phone number beneath the Next button. Follow that option and save the recovery code when presented. A number is optional for this setup; it remains useful for recovery and may be required by other Steam or game features.

Without a linked number, Steam cannot use it for SMS recovery. Keep the recovery code accessible without the device. If you later add or change a number, use Steam's Account Details → Contact Info. ODA does not manage that setting.

Use email Steam Guard for sign-in#

Valve recognizes email Steam Guard as account protection. It does not require a smartphone or a desktop authenticator. If you only need to sign in, this may fit your needs.

Email protection is not the same as an established mobile authenticator for item holds. Review standard holds, account restrictions and the CS2 exception before choosing it for a trading account. If an authenticator already exists, switching methods is an account change; read Steam's warnings before removal.

Set up a desktop authenticator#

For an existing SDA file, import the current authenticator. For an account without an existing authenticator, ODA's Add authenticator flow uses Steam's response to tell you whether the activation code is sent by SMS or email. Follow the channel actually shown, save the recovery code and complete the encrypted backup.

A recorded test on August 10, 2026 completed enrolment for one no-number account using an emailed activation code. This is historical evidence for that account, not a new test of the latest release or a guarantee of the route Steam will offer yours.

Moving an existing phone authenticator is different from enrolment. ODA's Move from phone flow requires the current authenticator for sign-in and the phone code from the linked number. Do not remove it just to try no-number setup.

Plan recovery before removing a device from use#

Phone-number questions#

Can several accounts share one number?
Valve permits it, but warns that shared-number accounts may be linked for policies and restrictions. Check the consequences before sharing one.
Can I use a landline or VoIP number?
Valve excludes numbers that cannot receive text messages and says it does not accept new VoIP numbers. Follow its current number requirements rather than using a public code-receiving service.
Can I remove a linked number later?
Steam provides that action under Account Details → Manage your phone number. Read the warnings first: removing a number and removing the authenticator are different, and the number's removal loses SMS recovery.