If you want to edit photos then Affinity is passable, and GIMP is a joke.
If all you want to do is draw, then Krita is a very capable alternative to Photoshop, but being good at only a specific subset of Photoshop capabilites doesn't turn it into a replacement for it
It's better to keep them as mobi files than converting to epub. Mobi works on almost every device, and converting to epub can always result in messed up formatting or chapters.
If you absolutely have to convert the files to epub for some reason, at least keep the original mobi files as well
VoLTE is needed, because 4g does not have any native calling functionality. Older 4g phones don't have VoLTE, and revert back to 3g when trying to do a phone call. Since 3g is getting shut off, this means those phones will no longer be able to do calls at all, only data and SMS will keep working over 4g for them
Maybe you need to get your eyes checked. I rarely get blinded on the road in Germany, and when I do it's almost always someone who just forgot to turn off his high-beams. Active matrix headlights are very common here nowadays and never blind me
If you want to edit photos then Affinity is passable, and GIMP is a joke.
If all you want to do is draw, then Krita is a very capable alternative to Photoshop, but being good at only a specific subset of Photoshop capabilites doesn't turn it into a replacement for it