Hello @Cocobby90. We'll wish to take a closer look! Would you please send us a private message with your phone number and pin?
Note: For you to send a me a Private Message only need to click on my username, which will take to my profile, once you're there on the right side of the screen you will see the option to send me a Message.
Really sorry to hear that, @Ledwards0103! Let’s check this thing out. Does your phone say Invalid SIM card? Have you tried removing the SIM card? Can you please let us know the make and model of the phone?
Oh, I see! We'd like to confirm, is the iPhone X a Boost Mobile phone or did you get it from a different carrier? If a Boost phone, is the SIM card the original one that came with it?
Understood. We'd like to access your account to further assist you. Can you please send us a private message with your phone number, PIN, IMEI and ICCID (SIM card numbers) of the iPhone X you have?
To send a private message just click on the picture of any Boost Mobile agent and, in the next screen, click "send this user a private message".