How to upgrade this phone

[Franco_Victor]

My phone was very slow and some apps can't download and i need to upgrade my phone and my warranty is expired

[Jiaszzz_ASUS]

Hello Franco Victor ,
Could you please provide the model name (for example, ZE620KL or ZS620KL) and the current firmware version?
ASUS offers Auto Update and Manual Update to update the firmware.
Please refer to the following link to check and update your firmware version.
[Phone] How to update firmware on my phone? | Official Support | ASUS GlobalThank you.

[ASUS_Bot]

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