PRL needs to be updated before international roaming. How to update it?

send SMS update manually: send PRL (case insensitive) to 1659165. PRL server downloads 4 short messages (either in Chinese or English, Chinese is: 1/4 PRL update in process, 2/4 PRL update in process, 3/4 PRL update in process, PRL update is successful; English: PRL Update in Progress 1/4, PRL Update in Progress 2/4, PRL Update in Progress 3/4, PRL Update Successful). Only when the last message is received can the PRL update be proved successful. If you don't receive the last message, please try again after a while.

through the terminal menu update (only supported by some new phones): on the phone, go to the "customer service" menu under the main menu and select the "roaming list update" submenu. The terminal automatically sends SMS to update PRL. PRL server downloads 4 short messages (either in Chinese or English, Chinese is: 1/4 PRL update in process, 2/4 PRL update in process, 3/4 PRL update in process, PRL update is successful; English: PRL Update in Progress 1/4, PRL Update in Progress2/4, PRL Update in Progress 3/4, PRL Update Successful). Only when the last message is received can the PRL update be proved successful. If you don't receive the last message, please try again after a while.

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