iphone 4

Help me! I'm using an iPhone 4 to control my drone and lately and it's been working perfect. The only problem that constantly happens to occur is I can't see any of the buttons on the right when in flight mode. I can't see the record button, photo button but yet I can see the three dots in the...

That's my question basically. I use a nokia lumia so that's out of the question, my sister is gonna gift me her old Iphone 4 and I'm wondering if can be used as the monitor to flight the P3P Thanks and sorry in advance if this question has been answered before but I didn't find any topic or...