@TripleU so maybe you should dump the boot partition with mtk client (i heard it is also possible with sp flash and should be easier to install but I've never got a chance to try) patch it on magisk and reflash
@TripleU you can, but i think its better to have the default details (unless you want to have a kosher imei) and if you want just the imei and not the whole details you can enter in the dialer *#06# and save the number