Hi, hope I post in the right thread.

1. Wanna ask if anyone has experience in buying imported phone from CocooShop on Shopee? [shopee.com.my/cocoa.my] Rating is quite good at 4.9.
2. So, if can, is there any extra procedure that I need to do. I read something about SIRIM? Or, can I just buy and wait for it to deliver?
3. Plan to buy global rom, for those who buy it, any problems using it in Malaysia?
4. Malaysia's 5g use 28/78 band right, so if I chose imported phone with these band, am I safe?

I don't have any experience in buying imported set before so a little bit worried. Don't want to fall to scam. Thanks for helping me.