Hi there! I see you're encountering "Error 85" with Second Line 2nd Phone Number. To help you best, could you please tell me more about when this error appears? For example, does it show up while activating your second line, during calls, sending messages, or some other action?

Also, if you’ve already tried any troubleshooting steps, feel free to share those so I don’t repeat them. Once I have a bit more context, I can guide you through a step-by-step fix that fits your iPhone running iOS 18.5.

Yes can’t Tex or call only can receive Tex and call

Thanks for sharing the details! Since you can receive texts and calls on your Second Line but can't send texts or initiate calls, this usually points to some outbound call or message settings needing adjustment or a network-related issue on your iPhone running iOS 18.5. Let’s work through some focused steps:

1. Check Cellular Line Setup in Settings
- Go to Settings > Cellular
- Under your cellular plans, make sure your second line is active and set as the default line for voice and messaging if you want to use it for that purpose.
- You can also try selecting your second line explicitly as "Default Voice Line" or switch the default line temporarily to the second line.

2. Review Messaging Settings
- Navigate to Settings > Messages > Send & Receive
- Confirm your second line’s number or email is selected under “You can be reached by iMessage at”
- Check that the correct number is selected under "Start New Conversations From" for your second line.

3. Airplane Mode toggle
- Turn on Airplane mode from Control Center or Settings, wait 30 seconds, then turn it off to refresh network connections.

4. Reset Network Settings
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings
- This won’t delete your data but will reset WiFi passwords, VPN, and cellular settings which often fixes outbound call/text blocks.

5. Ensure No Call or Message Blocking
- In Settings > Phone > Call Blocking & Identification, make sure your number isn’t blocked from making calls.
- Also, verify any restrictions in Screen Time > Content & Privacy Restrictions, just in case.

6. Check Carrier and App Status
- Verify if your account and second line are active and authorized with us (Second Line) via your account dashboard or contact support to check if there are any service restrictions or outages.
- Check if you are on the latest version of the Second Line app and that it has permissions for calls and messages in your iPhone’s Settings > Second Line.

Could you please try these steps and let me know if the issue with sending texts and making calls persists? If you’ve done some of these already, kindly tell me which ones so I can suggest more advanced fixes.