Questions about using mobile when battery charging

[Anonymous]

Is it harmful for phone to run when charging? 

[innovativeAR121]

No harmful but always not use
Remember always your data cable or adopter is damaged or no??? Then use

[Asadamjadali]

No damage. Nowadays batteries are very smart. But not for old phones because they heat very fast and damage both screen and battery. This is for old phone. New phones batteries are smart and processor does not heat too much

[user9992112]

There shouldn't be any problem but it is considered better not to use it.