SMS verification code not received: a complete guide to troubleshooting

If you experience that the confirmation code is not arriving on your phone, this may prevent you from accessing your account on the platform. There are several reasons for this issue—from technical glitches to security setting errors. Let’s go over how to diagnose and fix the situation.

Clear device memory and free space for SMS

First, check if there is available space on your device. If your incoming messages and chat history are full, the system may not allow you to receive new SMS codes. Delete unnecessary text messages and clear chat history. If your phone has very little space, move heavy applications to a memory card or cloud storage. Often, simply freeing up memory resolves the issue with missing confirmation codes.

Check mobile network quality and signal

Unstable mobile network connection is one of the most common reasons for delays or loss of SMS. Make sure your mobile signal is stable and you are in an area with good coverage. Try moving to a different location where the signal is stronger. Also, restart your phone completely—this often helps restore a stable network connection and allows you to receive delayed messages.

Disable spam blocking and check security settings

Apps for smartphone protection (antivirus, anti-spam filters, blacklists) sometimes block incoming SMS from unknown senders in the background. Go to your device’s security settings and ensure that spam blocking is disabled or configured so that confirmation codes are not filtered. If you have third-party security apps installed, open their settings and add the platform’s number to the trusted senders list.

Check your SIM card status

If you are using a dual SIM smartphone, try switching the SIM card to another slot. Sometimes, contacts in the slot oxidize or become dirty, causing issues with message reception. Remove the SIM card, clean the contacts with a soft cloth, and reinsert it. If that doesn’t help, try inserting your SIM card into another phone and attempt to receive the confirmation code again. This will help determine whether the problem is with the card itself or your device.

Contact your mobile operator

If after all the above steps the confirmation code still does not arrive, contact your mobile service provider directly. Check whether your number’s service has been suspended, whether there are technical blocks on incoming short messages, or restrictions in your current plan. Some plans filter SMS from short numbers, which may prevent receiving confirmation codes.

Contact platform support

If none of the above methods resolve the issue, the final step is to contact the technical support of the platform you are using. Prepare all necessary account information and describe the confirmation code problem in detail. Support staff can verify your profile status, ensure that the SMS was sent, and suggest alternative verification methods if the confirmation code continues not to arrive.