Lighting cable "not original" - will it harm iPhone?

Hello

 

Stupid me *yes*

 

Got an additonal ligiting cable for IP5 for charging at work.

Did not notice that it was at all not an original Apple product...bad on me.

 

So, I have noticed that when I plug into phone, and try to work with phone..."touching" is like "freezed" or "slowmotioned"...or even when i touch lower level of icons, it "recognizes" the icon 3 rows above.....

 

This is one and only cause i get, rest is oki, I mean cable does it work  - charding...

 

Can these dodgy cables harm the phone at some point?

 

What do you say...

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