What is the ruling on owning a mobile phone that has a permanent cross sign that cannot be removed?

The cross found on purchased items must be effaced and erased. If it is a three-dimensional object, it should be broken. If it is colored, it should be blotted out. As for lines that are thought to be crosses but are not, such as some mathematical symbols on electronic devices, there is no harm in them, and they are not considered crosses.