2 Add power delivery specifications.
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Q1: No it is not harmful. Your phone will only draw the current it needs from the charger. As long as the charger voltage is right and it is rated to supply at least the current required by the device you will be fine.

Q2: Without a data sheet we don't know.

Edit: The power delivery specifications indicate that 1.5 A was normal for battery charging with higher power available on later (2012) specifications. If it's a cheap PSU it might just have 5 V connected to each USB port without any current limiting at all, never mind individual port current limiting.

Q1: No it is not harmful. Your phone will only draw the current it needs from the charger. As long as the charger voltage is right and it is rated to supply at least the current required by the device you will be fine.

Q2: Without a data sheet we don't know.

Q1: No it is not harmful. Your phone will only draw the current it needs from the charger. As long as the charger voltage is right and it is rated to supply at least the current required by the device you will be fine.

Q2: Without a data sheet we don't know.

Edit: The power delivery specifications indicate that 1.5 A was normal for battery charging with higher power available on later (2012) specifications. If it's a cheap PSU it might just have 5 V connected to each USB port without any current limiting at all, never mind individual port current limiting.

1
source | link

Q1: No it is not harmful. Your phone will only draw the current it needs from the charger. As long as the charger voltage is right and it is rated to supply at least the current required by the device you will be fine.

Q2: Without a data sheet we don't know.