Download Android Lollipop 5.0 stock firmware for Mlais M52 Red Note smartphone from here or from here. Download another Mlais firmware from here.
Firmware details
Archive: Mlais_M52_20150721
Image: 20150721_c211_jbl_a128_3m_hd_mlais
Archive size: 548 MB
Support: Mediatek MT6752
Project: c211_jbl_a128_3m_hd_mlais
Config_version: V1.1.2
Build number: c211_jbl_a128_3m_hd_mlais-user 5.0 LRX21M 1437458096 test-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.
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