no sim card

So I have a Redmi note 8 pro Indian version , some days ago after a boot My phone was stuck on boot loop. saying This miui version cannot be installed in this device . I have visited service center they told me they are unable to install software you have to change the motherboard. so I came...

Hi, I live in Spain and I have problems with my phone bands, indoors I can not talk to the phone, and I have not 4G only H or H+, coverage while my Huawei P8 and another phones, yes. Solution? enter engineer mode *#*#3646633#*#* and "Bandmode" to change the bands most suitable for my country...