Hi! I see you're having trouble receiving the SMS code from the Yandex Go app on your iPhone with iOS 18.7. Let's make sure we get you set up smoothly.

First, just to clarify:
- Are you unable to receive any SMS messages at all, or is the problem only with SMS codes from Yandex Go?
- Is your phone number entered correctly with the right country code?
- Are you using a local SIM card, or roaming?

Let me walk you through some common steps that help resolve this issue:

1. Check SMS Blocking Settings:
iPhones have options to filter unknown senders or block messages. Go to Settings > Messages and ensure filters like "Filter Unknown Senders" or "Block Messages" aren't stopping the code SMS.

2. Verify Network and Signal:
Make sure you have a stable cellular signal. Sometimes codes may not come if the network is weak or temporarily down.

3. Restart Your Phone:
A simple restart may help refresh network connections and message delivery.

4. Check Phone Number Format:
In the Yandex Go app, ensure your phone number is entered starting with the plus sign and country code (e.g., +1 for US), no extra zeroes or spaces.

5. Disable Do Not Disturb or Any SMS Filtering Apps:
Sometimes third-party apps or settings can interfere with SMS delivery.

6. Try Resending the Code or Use a Different Method:
The app sometimes gives an alternative verification method like a call or email.

7. Carrier Issues:
Occasionally, your mobile carrier might block short codes or international SMS. You might want to contact them to confirm SMS delivery from Yandex numbers is allowed.

Also, Yandex Go might not be able to deliver SMS if your phone number is from a country where their service is limited or if there are temporary restrictions1.

If you've tried these and still don't receive the code, please let me know which step you reached, and if you're in a specific country or using roaming. That way, I can tailor advice further or help escalate the issue.

Are you satisfied with this starting solution?