Why is At&t mobile security app saying my mobile data is off ?

When I go into settings my mobile data is showing on but the mobile security app says mobile data is off and there is no way to change it . Anyone have this issue or know why it's showing off? I would really like to make sure all my services are working properly after I got some malware on my phone and had to remove it. I let someone else borrow my phone and don't know where the malware came from but I want to make sure I don't get it again .