OpenWrt now support ZTE F660 V3.0 and HGG420n

Got it, i will try it. Thank you!

i have ZTE F660 V5 2018 can i install openwrt on it ??

你好楼主,问下openwrt编译时怎么添加无线。
还有怎么能添加出国功能,谢谢

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Thank you.

What can I do to check avaibility ZTE F660 V2 for openwrt mod?

none of the ZTE F660 versions are currently supported.

Just check the cpu model. If it is not marvell 88f6560, it is not supported.

I wish to extend my thanks to @winnt5 for bringing Marvell 88f6560 to OpenWrt. The effort is amazing and wished I could see XPON working and this pushed upstream. Still credit where is due.

I'm afraid that upstream will not accept this kind of kernel hack, which breaks other targets, although my patches won't be applied for them. The PHYs have identical ID with linux supported ones, but incompatible with current driver. XPON is an extremely difficult task because linux kernel is not ready for them. Vendors have their own implementations.
I'm glad to see someone using this project.

As i understand. Xpon module has own firmware (not sure maybe only sfp). Is it any option to pair it with lan in unmanageable mode ?

No, XPON has special driver that is not in mainline kernel. It's software interface is also different from ethernet.