Message under date and time on the first screen

[Anne60110]

On the first screen under Time and date i have the following message. Plpplp p2pp2p plp plp ..........
Do You hâve an idea How to remove it?

[_alexdon_]

Check if in safe mode it is the same:

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008

[Alexander1]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

It seems like you have added a owner info by mistake. 

Go to settings > security > owner info > unmark 'show owner info on lock screen' or change/remove the text in the box below.