i can open facebook on phone but not on computer windows 10 .

On Windows 10, if Facebook says a verification code is sent but it never arrives, the issue is usually with how the code is being delivered or with temporary security blocks.

Try these steps in order:

1. Check for security blocks and rate limits
   • Avoid repeatedly clicking “Resend code” or trying many times in a row. Excessive or repetitive requests can trigger security systems that temporarily block sending verification codes.
   • If there has already been a high volume of attempts, wait at least 24 hours without trying again. In some cases, waiting up to a week may be required for blocks to clear.
2. Check the phone and SMS settings
   • Make sure the phone is turned on, has signal, and can receive normal SMS from other senders.
   • Confirm the inbox is not full and that the default messaging app is working correctly (try sending/receiving a normal text from another phone).
   • Check if the phone is blocking texts from unknown numbers. If so, disable that block and then request a new code.
3. Confirm the number type
   • If the number is a VOIP (internet-based) number, many services will not send verification codes to it. Use a standard mobile phone number instead.
4. Try from a different network or device
   • On the Windows 10 PC, switch between Wi‑Fi and a mobile hotspot or another network, then try logging in again.
   • If possible, try requesting the code while connected to a different network to rule out issues with compromised or high‑risk traffic from the current location.
5. Wait out regional or traffic issues
   • Sometimes there is heavy or compromised traffic from a particular geographic region, and services slow or block code delivery from that region. These issues are rare and usually resolve automatically after some time.

If none of the above helps and the phone number is correct and can receive other SMS, the problem is likely on the service provider’s side (Facebook’s verification system) rather than Windows 10. In that case, use Facebook’s own account recovery or support options from a device where access is still available.

References:

• Troubleshoot Microsoft verification code issues
• Common problems with two-step verification for a work or school account