Ativar VoLTE MI A3 da operadora TIM Brasil. - Xiaomi Mi A3 Questions & Answers

Fiz muitas buscas na internet e não consegui encontrar nada que resolvesse o problema da não ativação do VoLTE na Tim BR. Vi muitos tutoriais algumas postagens e que o que resolveria seria o IMS do aparelho estar registrado na rede da operadora Tim. Não encontrei nada nem que pudece registrar o MI A3 no IMS da operadora. Alguém pode me ajudar? Não fiz root no aparelho aínda aguardando achar algo que resolveria.
Meu Mi A3 esta atualizado para o Android 10 one

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English only on XDA
Type *#*#4636#*#* in your dialer app and see if you have an option to enable volte

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Já o fiz, porém não ativa o VoLTE diz que o IMS não está registrado. Coloquei o chip em um Motorola g5 plus e conectou o VoLTE normal.

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Phael_7 said:
Já o fiz, porém não ativa o VoLTE diz que o IMS não está registrado. Coloquei o chip em um Motorola g5 plus e conectou o VoLTE normal.
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English only man!
Go to Settings > Call Settings (Sim and Network)
Tap Cellular networks > Enable Voice over LTE On/ Off.

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garylawwd said:
English only man!
Go to Settings > Call Settings (Sim and Network)
Tap Cellular networks > Enable Voice over LTE On/ Off.
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I already did it too, but it does not activate, typing the code * # * # 4636 # * # * the option is checked, when I go to IMS status it is not registered. Place the chip on the Motorola g5 plus and connect to VoLTE. Is there any solution for this

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Phael_7 said:
I already did it too, but it does not activate, typing the code * # * # 4636 # * # * the option is checked, when I go to IMS status it is not registered. Place the chip on the Motorola g5 plus and connect to VoLTE. Is there any solution for this
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Your operator might be blocking Mi A3 phone from using VoLTE. It was the case in my country, operator was using white list for VoLTE - only specifically allowed smartphones were able to use this feature. I am not sure which phone identification operator sees and uses, but you might try to spoof Mi A3 as Motorola G5 phone and see what happens. You are out of luck with unrooted phone though.

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Phael_7 said:
I already did it too, but it does not activate, typing the code * # * # 4636 # * # * the option is checked, when I go to IMS status it is not registered. Place the chip on the Motorola g5 plus and connect to VoLTE. Is there any solution for this
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the option needs to be disabled , not enabed:fingers-crossed:
type the code until you see on bottom screen disabled
on android 9 you dont have any icon to see volte but its enabled

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Phael_7 said:
I already did it too, but it does not activate, typing the code * # * # 4636 # * # * the option is checked, when I go to IMS status it is not registered. Place the chip on the Motorola g5 plus and connect to VoLTE. Is there any solution for this
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Click to collapse
It's not enough to activate VoLTE on the phone options, but make sure your dialed *#*#VOLTE#*#* to disable the VoLTE carrier check.
The next step is to load a compatible profile on the phone's modem. The default profile used in Brazil, aka "ROW Commercial", isn't compatible with TIM's VoLTE. If a compatible profile isn't loaded on the phone's EFS, it doesn't matter what you do in the android system, it'll simply not work.
To load another profile, try to follow this tutorial: https://forum.xda-developers.com/redmi-note-6-pro/how-to/guide-enabling-volte-t3914765
If the command there to activate diag mode doesn't work, try to find how to activate it on the Mi A3.