New Phone, service & sim. Won't activate says "This sim card from unknown source" Help!

[Newuser5672]

Just received my new phone and sim card.  This is a brand new service with a new number.  Followed activation instructions, but the phone keeps saying "This sim card is from an unknow source".  Unable to get help.  Been waiting for chat help for over two hours and still nobody came on.  Any help would be appreciated.

[Slimer]

I have the same problem, new phone, new sim & new account

[Micah]

I just fixed this on my phone. I have a ZTE and the system was not up to date. The following link helped me.

https://support.hellomobile.com/why-wont-my-sim-card-work-with-my-zte-smartphone/

[Micah]

I had the same problem. My phone is a ZTE that was running an old system version. The following link helped me.

https://support.hellomobile.com/why-wont-my-sim-card-work-with-my-zte-smartphone/