Mobile data APN setting
To use mobile data, you need to set APN (access point name) by matching it to corresponding service provider.
(USIM insertion, overseas roaming, etc.)
Settings > Wireless & networks > More > Cellular networks > APN
• When APN is not set, the phone tries different APN from basic APN list sequentially to match corresponding USIM therefore, mobile data risks getting activated with delay.
• When APN is not set, if the phone gets connected to an APN that is not actual data, you will be unable to use mobile data.
(You need to set APN corresponding to the fee table. For fee table, contact service provider.)