It's two-phase electricity. You can't charge your mobile phone on three-phase power. The phone will break.
China's three-phase voltage standard is 380V, the frequency between each phase is the same, the frequency is 50Hz. Due to the use of star connection for residential electricity access, so if China says three-phase 380V, the use of the mobile phone charger is to convert the 220V high voltage pulse into a 5V low voltage pulse, and then through a rectifier, voltage regulator circuit, into 5V stable direct current. You can't charge your phone.
The charger is usually designed inside the protection circuit, once the output current is too large, it will trigger the protection mechanism, suspend the current output, to avoid danger, even if the charger can output 50A current, the mobile phone internal charging logic control if 2A, the charging current will still be limited to 2A.
Neither. It's single-phase electricity. You're talking 380 volts. The charger can't handle it.