If it’s important to you to have an iPhone, then the kind of person who thinks it’s an aveirah and that you shouldn’t have one is probably not the one for you.
If you don’t care, or you know in your heart or whatever that you really shouldn’t have one but the yetzer hara is too strong or something like that, then by all means get rid of it. IF YOU WANT. Not for shidduchim. Why make a fake persona to attract someone who, if they are attracted to your fake persona and not the real you, is not necessarily your type anyway?
Any flaws in the theory? Please let me know before I hit shidduchim with a loud crash.