Episode 7 Discussion [rewatch]

[Nitrus]

There is software which does the hacking for you, you give it a target, it will scan the target for vulnerabilities and then gives you a list of options depending on what you want do, add an admin account, delete some data etc, you just select which one you want and bang you're in.

So I think it's believable that she could do that and not use a mobile properly. Besides, I think her incapability with her mobile were exaggerated by Danny to grab Harry's attention.