Lumia 640 with a light blue line on the screen

[Windows Central Question]

I bought a 640 dual sim three weeks ago and I just noticed a vertical light blue line 1/3 in on the right side of the screen. I neither dropped the phone or anything else - is this a common error and what do I do? It was not there earlier today and all of a sudden it occurred. I have restarted the phone without luck.

 

[willyb1973]

I had this on a brand New Lumia Phone, was there on first start.

I returned it for a new one :/

 

[xandros9]

Yup, you just had some bad luck.

get it replaced under warranty.