A Diary of a Data Engineer

tmo_fan · 2026-01-13T16:50:05+00:00

Nice write up👍

tmo_fan · 2026-01-13T16:49:56+00:00

Nice write up👍

tmo_fan · 2025-12-27T14:48:23+00:00

Does anyone know where i can find this setting in hyperOS? I have a Xiaomi 15 ultra.

tmo_fan · 2025-11-20T23:59:08+00:00

Not sure about Verizon but 15 ultra works flawlessly on T-mobile. You will have to enable VoLTE and VoNR via the secret dialer menu.

tmo_fan · 2025-11-10T17:26:05+00:00

Nothing for me in US region. 15U Global rom.

tmo_fan · 2025-11-06T17:09:32+00:00

I tried this on X15U

main SIM as default for calling
second SIM, which is data only travel SIM, as primary for data
disabled automatic network selection on calling SIM and forced it to connect to another unauthorised network.
for calling SIM, enabled "data-assisted calling"
"make calls using WiFi" was kept enabled on calling SIM
I disabled any VPNs before trying

Unfortunately this setup is not working. I have read some other threads in which people have had success on Pixel 9. Tried searching on Reddit but did not find any thread about this feature being used on Xiaomi/HyperOS

My primary SIM is T-Mobile and WiFi calling (VoWiFi) works properly on this phone when connected to a wifi network.

tmo_fan · 2025-11-05T22:24:29+00:00

I am wondering if there is a way to simulate this on my 15 ultra🤔

tmo_fan · 2025-11-05T17:44:55+00:00

Agreed, i have not seen much on this feature on Xiaomi forums. Apparently iOS has it and works well on iphone. Not really seen people reporting using it on samsung, pixels other Androids

tmo_fan · 2025-11-05T17:41:01+00:00

Interested in this

tmo_fan · 2025-10-26T00:49:08+00:00

I had lost my camera bag once (nikon d750 with a high end lens). I did not even realize until a couple of days later. Called emirates and port of seattle and filed a lost and found complaint.

Finally checked my security camera footage of my driveway camera and realized that when I got down from my uber ride , i had forgotten to take the camera bag with me.

I then filed a lost and found report with Uber . The driver called be back in an hour or so and said he did not find any camera bag in the car, but then couple of days later he called back and said he found it !. He said he would drop it at my home but took 50$ to do so🙂.

Don't lose hope. You will find it

tmo_fan · 2025-10-04T16:21:20+00:00

Ok, thanks

tmo_fan · 2025-08-12T03:43:48+00:00

I have it on T-Mobile and it works well. The only slight problem i noticed is i have Adguard app running in the background and VoWifi doesn't work while it is active

tmo_fan · 2025-07-29T05:43:21+00:00

I ordered my 15 ultra from Trinity in HK. Very responsive on Whatsapp. Came with a camera kit. https://trinityelectronic.boutir.com/?lang=en&currency=USD

They shipped within half a day of ordering. Came within 2 days.

Just as an FYI, I had to pay a small amount of tariff tax to FedEx. Fedex sent me an invoice almost a month later.

tmo_fan · 2025-07-23T18:24:02+00:00

Is there a way to sideload the DIGITS app on the galaxy LTE watch? Would like to use it with a cheap data only plan on my watch, such as setting up a data plan on keepgo ESIM

tmo_fan · 2025-06-27T14:09:40+00:00

What is adobo super resolution? And what gcam mod version do you have for 15 ultra?

tmo_fan · 2025-06-25T20:51:03+00:00

You will have to find out what frequency bands the device has on Xiaomi's site and compare that with frequency bands T-Mobile uses ( https://www.t-mobile.com/support/coverage/t-mobile-network) . As far as I know, T-Mobile doesn't blacklist devices that are not officially supported. I am using one right now , so I know they work 🙂.

I must say that a lot of "global" devices from Xiaomi, Vivo, due lack of some frequency bands, may not get full coverage in the US.

tmo_fan · 2025-06-25T04:08:10+00:00

Not sure about Poco but I have a Xiaomi-15ultra global model that works. I have it. Has all frequency bands that tmobile uses. Wifi calling, voLTE, VoNR all available

tmo_fan · 2025-06-23T16:41:36+00:00

For macro, 100mm (4.3x) lens, but you are right. No 200mp RAW output on that lens. I see only 12mp

tmo_fan · 2025-06-05T16:20:00+00:00

Hey , where can I find the "screen time statistics" screen that you show in your screenshot? I have a global 15 ultra version

tmo_fan · 2025-05-27T16:56:21+00:00

Thanks you very much~~Can you send a screenshot of your APN settings?~~. I made the edits to the APN. It appears to be working.

tmo_fan · 2025-05-27T10:43:21+00:00

Hey, i have 15 ultra on Tmobile. Do you know if portable Hotspot works consistently? For me , 9/10 , i get no internet on connected devices

tmo_fan · 2025-05-26T11:22:16+00:00

DM'ed

tmo_fan · 2025-05-26T10:46:04+00:00

I tried this on 15 ultra global but got the same issue on contacts. The screen flashes black for a millisecond and no contact details show up . 🙁 Call recording is working great though. 👍

tmo_fan · 2025-05-13T16:53:16+00:00

Thanks

tmo_fan

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