@Adam72 If you have a TCCM phone, you have an international phone, that’s additionally locked.
You can not flash any Chinese Firmwares on your phone. But please try it out, nothing bad can happen to you.
When you try to flash a Chinese Firmware, the Recovery will throw a “Corrupt Firmware” message at you :P
Thanks again for answering me. In fact I swiched from I to A and back several times and each time the phone worked flawlessy. The only disadvantage was the lack of google services but it is easy to download them from flyme store.
My original question was asked because someone on Polish forum wrote the same thing as you in the post above that it was impossible to flash A soft over international MX4 and I must have bought a fake international version if I could do that. That is not true. It is possible, at least on TCCM versions. Currently I am running on 18.104.22.168A and it works fine. I am planning to upgrade to the latest 22.214.171.124A, but to do that I have to downgrade to 4.04.I first and then apply the A version. Always make a clean install.
For me it is just the problem that I versions shows up too rarely. I like to change versions and watch what is changing. Besides in A versions they still use themes for customization and chinese music service. But A versions are not multilanguage, so you have only english or chinese.