Two-way recording of flutter outbound calls

1. Problem description
An app based on calling service is being developed. One requirement is to make calls through a list of phone numbers and make two-way recording at the same time (regular customer service phone recording reservation). I used to use a dedicated landline, but now I want to add app to achieve mobile office.

Phone recording flutter
Jul.18,2022

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c088cb-328f1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c088cb-328f1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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