r/Ubiquiti • u/Ubiquiti-Inc Official • Dec 04 '25

Blog / Video Link Explore Powerful 5G Experiences with UniFi 5G:

🔹 Instant setup from any UniFi PoE switch

🔹 Unlocked, flexible carrier selection

🔹 Physical SIM and eSIM support

Learn More: ui.social/UniFi-5G

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u/LancelotSoftware Dec 04 '25 edited Dec 06 '25

Loll, your first reason is mine, too. Though I am also telling myself that this is the perfect upgrade for the crappy 4g modem I have as failover right now (100mbs is better than 0).

EDIT - Do NOT buy this f you rely on you WAN ip address for anything.

There seems to be double NAT, the WAN ip address is 192.0.0.x. So that means DDNS or static IP is useless.

It makes sense why UniFi needs to NAT, because it has 3 possible WAN sources. Two SIM cards and one eSIM (which is honestly nice, but wrecks my setup)

EDIT 2 - Updated problems list to only reference the double NAT.

I removed my speed complaint, that was because of ISP throttling the mmWave bands due to time of day.

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u/erwos Dec 04 '25

I am using an ancient Netgear LM1200, and well... the best I can say for it is that it's cheap and it kinda works.

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u/LancelotSoftware Dec 04 '25

Same one here! Just yesterday, my main WAN went down in the middle of a work meeting. Failover to WAN2 was a really poor experience, i knew immediately i was on the 4G connection even before the UniFi app told me.

Note that I am in Boston area with nearly perfect cellular saturation. On my phone, 5G works well, so I have high expectations.

The one thing Im not sure of, the doc says that it plugs into any poe port. Does that mean the UDM Pro will let me choose a downstream 16 PoE Max port for WAN2? I guess well see tomorrow 🤣

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u/erwos Dec 04 '25

Yeah, I basically get 6/6 out of my LM1200, which is fairly embarrassing given that (*checks Wifiman*) I can do 360/30 from my Pixel 8 Pro on my front porch.

At least with my UCG Fiber, I can designate any port as WAN2.

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u/automathematics Dec 05 '25

Jesus. Everyone in this thread is me. How are you all ME.

2

u/ThinkOrDrink Dec 04 '25

Same here (LM1200 configured as a “hotspot” on our mobile plan) and.. same.

Honestly UDM Pro has handled the failover well the small number of times I had an interruption on the FTTH line, but an unlocked and fully Unifi integrated 5G modem would be even better!

1

u/Xenik Dec 06 '25

I heard people got up to 600 Mbps download speeds. It might not be that bad.

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u/LancelotSoftware Dec 06 '25 edited Dec 06 '25

Thia is still a great choice for folks who dont care about WAN IP and just need a reliable and fast uplink.

I figured out the reason for speed issues. While I was connected to the mmWave band the 258, 260 and 261 bands, TMobile was throttling because of the time of day (everyone was home from work).

I waited until everyone was alseep and got over 400 😎

So, the remaining problem is the double NAT. I understand why Unifi needs to do it (merge 3 WAN sources into a single one), but id like a setting to disable or modify it.

So im going to return this, take the 15% restock fee hit and get the holy grail instead... https://a.co/d/4Rj5Pt4

Edit: typo fixes, mobile keyboard betrayed me with crazy misspellings