It’s a 3G device? May be running on Android KitKat or Lollipop? Try using a high-end device.
I used it on a 3g device and it works perfectly. I used on some other 4g devices and it didn’t work. Plus the android version of the phones I tested it on was greater than android 6.0
Check up width and height of the device
I don’t understand, should I send screenshots of my app Design and blocks?. Alot of users are complaining and I need to sort out this error soon
That’s the most sensible thing to do unless you want people to guess what the problem is.