iPhone XS Max stand

Just got an Ender 3 a few days ago and thought I'd have a go at creating something of my own. Went on to Tinkercad and made this stand for my iPhone XS Max which is quite big and heavy phone. I added supports and made the 40% infill (I was hoping that would add strength). The support structure at the back was hard to remove and it needs some finishing in terms of smoothing/sanding where the support was - any tips on how I could do that would be great.
**Update - I added some text to the front which makes for a great personalised gift
Created a hole for the charger so the iPhone can be left for long periods of time in the stand if needed.
Also created one with a name imprinted on the front, but there was some material left in name where there should have been a hole for a about 3 out of the 12 characters. Something to work on I think.
The stand feels feels quite sturdy and stable.
My iPhone has case and it just about fits into the slot with it on.
Overall dimensions are 80mm W