1. Local firmware upgrade is recommended.
2. Please download and use the utility provided by Grandstream for local firmware upgrade, avoiding Internet or power interruption that may brick the device during firmware upgrading process. Please download GS Upgrade Tool here. For detailed usage, please refer to GS Upgrade Tool User Guide.
3. Once upgraded to 1.0.3.x firmware, downgrading to 1.0.2.x or lower firmware version is NOT SUPPORTED.
4. Factory Reset is recommended after upgrading from 1.0.1.x to 1.0.2.x. Please backup data before performing factory reset then restore the data.