ReserveSMS

Zoho OTP not received: what to try

Updated 7 November 2026 · The ReserveSMS team

In short

  • Turn airplane mode on and off, or restart the phone, to reconnect to the network.
  • Make sure your messages app isn’t blocking unknown or promotional senders, and use the phone’s own SMS app.
  • If you set up backup codes, “Can’t access your mobile device?” lets you sign in with one.

Zoho texts a one-time password (OTP) to confirm your number and for sign-in.

The phone first

  • Turn airplane mode on and off, or restart the phone.
  • Check your messages app isn’t set to block unknown or promotional senders.
  • Use the phone’s default messaging app, updated, rather than another app.

Then the SIM and network

Zoho suggests putting the SIM in another phone and asking for the code again. If it arrives there, the problem is the first phone; if not, ask your network. If neither is the cause, email [email protected].

Locked out later

If you set up backup codes, choose “Can’t access your mobile device?” on the sign-in screen and use one. See our guide to backup and recovery codes.

Using a one-time number

A number from ReserveSMS receives codes for 20 minutes only, so set up an authenticator app or backup codes once you’re in. Ours start at $1, and the money goes back to your balance if no code arrives. Get a number for Zoho.

Common questions

Why isn’t Zoho’s OTP arriving?

Often a blocked sender or the network. Restart the phone, unblock unknown or promotional senders, and use the phone’s own SMS app.

How can I tell if it’s my phone or my network?

Zoho suggests putting the SIM in another phone and asking for the code again.

How do I sign in to Zoho without the OTP?

With a backup code, if you set them up: choose “Can’t access your mobile device?” on the sign-in screen.

Numbers for the apps in this guide

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