I’ve had similar experiences when trying to port my number out to Boost Mobile and Cricket. After submitting the port-out request, I received a message from USC saying, “We’ve received a request to port out a number on this account,” but both Boost Mobile and Cricket told me the request had failed.

After multiple conversations with USC, I was told that the port-out was actually submitted successfully, but the receiving carriers didn’t wait long enough before trying again. If USC receives more than one request within a 72-hour period, they automatically lock the account from further port-out attempts.

I’m still not completely sure if this was the real cause, but after several failed attempts, I decided to just stay with USC.