Moderate. But if you short the wrong pin, you permanently fry the motherboard.
Have you tried converting your Oppo A5? Share your experience in the comments – model numbers and tool used are especially helpful. Oppo A5 China To Global Rom
If you have purchased an Oppo A5 from the Chinese market (often grey-imported to other countries), you have likely encountered the frustrations of the : no Google Play Services, default apps in Chinese, a heavy ecosystem of Chinese bloatware (Baidu, Weibo, Alibaba), and missing network bands or languages. Moderate
The Oppo A5 (model numbers often for Global, PBAM00 or PBAT00 for China) runs ColorOS. Chinese versions come with: default apps in Chinese