I called Sprint customer service about a month ago to request unlock of my iPhone X. I tried a different SIM today to confirm the unlock and received an error message that it wasn't unlocked.
Please assist and expedite
Hi, good morning. I'll also like you to take a look at our unlocking policy below.
Sprint will unlock a device from Sprint's network under the following circumstances:
For SIM unlock-capable devices (generally most devices launched after February 2015), Sprint will automatically unlock postpaid devices when they becomes eligible.