March - last edited March
For whatever reason the developers seems don't think changing name is necessary since the first FIFA Mobile, which is probably easier to implement than adding more bugs to the games which they somehow achieved more.
Seriously, I don't understand. Every other mobile games I play I can change the name (other than FIFA, I'm playing Japanese mobile games now), internally the games use different user id anyway.
And is there any warning when you type in your name that you can't change name? I don't really remember.