How to Factory Reset a Grandstream Phone or ATA (GRP, GXP, HT Series)
Factory resetting a Grandstream phone is one of the most common tasks MSPs and VoIP technicians handle during device redeployments, tenant changes, and troubleshooting cycles. This guide covers step-by-step factory reset instructions for every major Grandstream series, including GRP260x, GRP261x, GXP21xx, GXP16xx, and HT801/HT802 ATAs, using phone menus, boot key combos, pinhole resets, and IVR methods. You will also find default login credentials after reset, tips for dealing with auto-provisioning loops that pull old configs back immediately, and practical MSP workflows for clean reprovisioning. Whether you need to factory reset a Grandstream phone before a new deployment or recover a locked-out ATA in the field, this is the only reference you need.
