Same thing here. Tried on multiple devices and did clear cache and cookies. Sadly, I just bought a phone through Boosts website which does not work, but now it is over the 7 days to return. Purchased ANOTHER phone to swap to; however, it says "Sorry, this SIM card is not compatible with our Expanded Network." even though this was a Boost Mobile phone (from Walmart). Now I have purchased 2 phones and cases to have NO WORKING PHONE. I have been a long time customer, but this is pushing me over the edge to find a new carrier.
For the first device (from Boost) there was a SIM card inside and one on a card. I followed the directions and was able to activate that phone (using the one NOT preinstalled). The problem with that phone is it continually drops service. The second phone only had the SIM card that was pre-installed in the device.
We understand, @Davidriggs. Please send us a Private Message with your phone number and PIN so we can take a look. To send a Private Message you can go to your profile and click on the icon with an envelope. Then you enter the username of the person you want to send a message to and the subject. Or you can go to the user profile by clicking on the username and click on "Send this user a Private Message".
Agreed @Bristol ! They just lost my wife as a customer due to this. Spent over $200 on two new phones and we can not get either to work. They will be losing my account as well if this continues when I go looking for a new phone.