This is the official AT&T LG Phoenix Plus User manual in English provided from the manufacturer.
LG Phoneix plus x410as (aka LMX410AS) is the second AT&T Prepaid handset with Android 8.1 Oreo. It is a variant of the X410TK which is now available from T-mobile as LG K30.
Now you can download the Quick Start Guide from AT&T official Support Page for LG Phoenix Plus – where you can find articles, tutorials, videos & troubleshooting tools for the phone.
Download LG Phoenix Plus X410AS Manual
LM-X410AS_ATT_UG_Web_EN_V1.0_180612 [LG Phoenix Plus User Manual IN English]
LM-X410AS_ATT_UG_Web_ES_V1.0_180612 [LG Phoenix Plus User Manual IN Spanish]
LG official may post an updated LG Phoenix Plus LMX410AS manual for Android PIE if LG decides to release Android Pie 9.0 firmware Update for the LG Phoneix plus.
Will my AT&T LG Phoenix Plus receive Android PIE Update?
The LG Phoneix plus x410as (aka LMX410AS) was launched in 2018 with Android Oreo. LG might release the PIE Update for the device. But, there are no words from LG or AT&T about the Android PIE Update plan for the LG Phoneix plus x410as.
Below are LG Phoenix Plus (aka LG K30) variants known so far:
Above models are exactly the same devices, so you can use LMX-410TKB cases for LM-X410AS or other models in the above list.
But You can not flash the LMX-410TKB firmware onto the LG Phoneix plus x410as.