Download Android 2.3.5 stock firmware for Lenovo A520 smartphone from here or here. Download previous firmware from here.
Platform: Mediatek MTK6573
Archive file size: 148 MB
Model: Lenovo A520 smartphone
Build number: lenovo73_gb-user 2.3.5 GRJ90 A520_S127_120730.20120731 release-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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