Using different location's firmware will damage the hardware with the same version like US v2.0?
I bought two deco be85 in Japan and take them home in China mainland and I found it seems a little bit weak signal to cover my house with two kits. So I think if I can flash a US firmware in the Japanese version (ignoring the law problems since I am in a signal cage won't disturb the social radar and other services) it will enhance my signal.However, there are two problems :
1.if I flash a US firmware with the same hardware version (US v2.0) in Japanese kit, will it damage the hardware or will the kit be listed to blacklist for warranty?
2.If I do not care warranty,can I flash the firmware I like with the same hardware version(US v2.0) (ignoring the law problems)for fun and researches?
I will very appreciate it if someone can answer two problems for me!