Definite no from me. I've never seen a kid the age of 12 and under use a cellphone for anything other than games. During school times it's just a distraction as kids just play games in class. The only time it's used as an educational device is for being a calculator, which is something you can just buy for 3$ instead.
The argument that it's for "safety" is honestly not that great. Seriously, the chance that a kid is going to get lost or hurt and needs this cell phone isn't great, because it's something that parents are supposed to teach their kids. Cell phones and tablets are ways for parents to avoid parenting, for their ease. And no, children don't need to have a cell phone to get a call when they're at school, the parent can just contact the office.
Honestly, I just feel like parenting with most (not all) parents in the past 2 years has become lackluster. Cell phones are becoming a problem in classrooms, as well kids are getting glued to their screens in general. I get that some kids want to play games sometimes, so parents should either let them play on their own phone, or get them a home console. Letting them have something they can take, use and hide in a learning environment is not a good idea. And the idea of keeping a child safe with a cell phone doesn't make much sense as your child is most likely only going to be going to school and being at home the whole time. As for kids that actually do go outside, either supervise them or actually teach them how to be safe and to not do dumb mistakes.