@Beckyboo22. Just to confirm, are you referring to the Phone icon or another one?
Please, follow the next steps:
1. Tap Phone icon.
2. Tap Key Pad if necessary.
3. Enter ##873283# then tap Call icon.
4. Tap OK when prompted.
After that, go ahead and check your service.
Hi there, @Beckyboo22! Thanks for reaching out to us. What's the make and model of your phone?