why rainbow appears on my phone while charging ..and why bubbling sound takes place at the time

[AC Question]

Of charging

it is happening to my device for more than fifty days now.
.my device number is GT S2 ...and it gets hot easily ...leave installed Samsung Mobile original battery one month back ...but still it is happening ...don't know what to do. ..Please help ...Sorry. Chad Hury.

And l changed my Sim ( l mean ported ) and my WhatsApp stopped operating ..S.C.

 

[belodion]

The rainbow colours may be some Daydream setting. The bubbling may be from the charger, perhaps faulty, perhaps not. The heat may be due to a failing battery or a fault in the charging circuit, or elsewhere. Expert diagnosis may be best, of both phone and charging equipment. Such diagnosis can hardly be done remotely via a forum.