WARNING: I am not liable in any way if your router becomes bricked. Flashing should be done with good connection to the router and stable power supply.
This is modded firmware from bjarnco32 's thread...
G'day mga ka-PHC.
Here's a copy of the P05IPLDT_AP_R051_V008 firmware for Boost Even R051, for those who wish to return to PLDT v008 firmware release. I extracted this from my device.
For those who are already on PLDT but wish to upgrade to...
Why to upgrade po? almost lahat na naka verison of 3.11 pataas nag hahanap paano i downgrade modem nila to 2.00 para ma openline better stick to that version po tips kolang.
FREE ZLT-S10G 2.10.1 to 2.11.3 Full PC/Mobile Permanent Openline (Unlock)/Change IMEI/Telnet/SSH Tutorial
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Full credits to R1BNC and Backspace Team