What does prl version 500 mean?

Prl500 is the storage capacity for downloading more resources, and Prl is the abbreviation of preferred roaming list. When the operator starts a new frequency (such as 3G), the original users need to update the PRL file. It doesn't matter if the Prl said on the mobile phone is updated. It's only used when roaming abroad. It doesn't matter at ordinary times. PRL tip: PRL is the abbreviation of preferred roaming list. When the operator starts a new frequency (such as 3G), the original users need to update the PRL file. When operators sign a new roaming service provider and users need to roam abroad, PRL needs to be updated. For example, how does the data card update PRL? If the data card has a short message receiving and sending interface, it can be done according to the above method. However, some data card SMS modules can't handle PRL update SMS correctly. R-UIM card needs to be inserted into mobile phone for PRL update.