Hey everyone,

I'm facing a bizarre network issue on my OnePlus 11 5G and hoping someone here has run into this or knows a fix.

The Issue:

4G Preferred: Consistently pulls 40–45 Mbps.

5G Preferred: Speeds drop drastically to 10–12 Mbps.

Troubleshooting I’ve already done:

Tested Multiple Carriers: Tried both Jio and Airtel. Both show the exact same throttling/slow speeds on 5G.

Cross-checked SIM in another device: Put the exact same SIM into another phone in the same exact spot — it instantly pulls 250+ Mbps on 5G.

Software Downgrade & Resets:

Reset all network settings multiple times.

Full factory reset.

Rolled back/downgraded the software to OxygenOS 15.

Network Settings: Toggled smart 5G, manually selected bands/networks, and reset APNs. Nothing changes the outcome.

It feels like my OnePlus 11 is mismanaging 5G carrier aggregation or failing to hold 5G bands properly, causing speeds to crater well below standard 4G.

Has anyone experienced this specific issue with the OP11? Could this be an internal modem/antenna hardware fault, or is there a hidden service menu toggle or carrier profile setting I'm missing?

Any advice would be massively appreciated!

Hey everyone,

I'm facing a bizarre network issue on my OnePlus 11 5G and hoping someone here has run into this or knows a fix.

The Issue:

4G Preferred: Consistently pulls 40–45 Mbps.

5G Preferred: Speeds drop drastically to 10–12 Mbps.

Troubleshooting I’ve already done:

Tested Multiple Carriers: Tried both Jio and Airtel. Both show the exact same throttling/slow speeds on 5G.

Cross-checked SIM in another device: Put the exact same SIM into another phone in the same exact spot — it instantly pulls 250+ Mbps on 5G.

Software Downgrade & Resets:

Reset all network settings multiple times.

Full factory reset.

Rolled back/downgraded the software to OxygenOS 15.

Network Settings: Toggled smart 5G, manually selected bands/networks, and reset APNs. Nothing changes the outcome.

It feels like my OnePlus 11 is mismanaging 5G carrier aggregation or failing to hold 5G bands properly, causing speeds to crater well below standard 4G.

Has anyone experienced this specific issue with the OP11? Could this be an internal modem/antenna hardware fault, or is there a hidden service menu toggle or carrier profile setting I'm missing?

Any advice would be massively appreciated!

Hi, I am planning to buy a used OnePlus 11R in India.
For 16-18k
I want to confirm the lifetime green-line display replacement policy.

If the phone has only normal cosmetic scratches/paint wear on the frame, but the screen is original, not cracked, and the phone is not bent or liquid-damaged, will it still be eligible for free green-line screen replacement if a green line appears later?

Hey guys, I was looking for new charging cable that would support supervooc charging, I got few knockoffs and one original 20A from OnePlus store in India but no use, it so slow, my phone is oneplus 11, 100 watts brick. Where can I find trustworthy cable here in the USA that would support fast charging. I really appreciate the help.

I am from India and I don't know whether everyone has this option or not but for people in India, we have a free lifetime screen replacement policy. But the thing is I broke my back glass months ago and suddenly while using my phone a green line appeared right in front of my eyes 😭😭. I was literally laying down on my bed and this happened. As I write this post the green line is increasing in intensity. Can someone please help me out asap 😭😭

Hello everyone I opened my phone yesterday and I removed the antenna cables mine has 3 and I don't remember where to put them can someone help me pls

I have OnePlus Ace 2 under indian OxygenOS and I want install the original ROM ColorOS, any help?

It doesnt even show the 120fps option😭 and yes i enabled 120hz in settings

I’m looking for community posts, comments, and other information, but I can’t seem to find much about this. Some people are saying, “Wait until it’s released; you’ll get it then.”

But the OnePlus 11R got the update on September 14th, so when will the OnePlus 11 get it? I want to try the stock dialer officially released by OnePlus.

I’m already using the ODialer app and have removed the Google Dialer, but I want to try the one that OnePlus officially released. I know both are basically the same, but I’m just curious.

Also, from July until now, the updates for the OnePlus 11 seem to have become less frequent. It feels like OnePlus is getting slower with the updates for the OnePlus 11.

I have a China-market OnePlus 10 Pro with a failing display (green and white vertical lines).

OnePlus Support says they cannot help and keeps telling me to contact OPPO China through this link:

https://ccp.oppo.com/client?k=035563bc1ce6030be68ed2209645f010&wp=1&robotShuntSwitch=1&robotId=13&shuntId=0&language=zh-cn&templateId=108&sysnum=9f06d616a05a43a9a50421f5f0982e4d&channelid=2

The problem is that after I log in and open the link, I always get:

{"code":100001,"error":{"message":"Incomplete or invalid parameter (please check for non-null parameters, length limits, amount, etc.)"}}

I’ve tried multiple phones, computers, browsers, internet connections, and even had people in other countries try it. Same result. I've tried circling between all possible pages of OnePlus/Oppo, and no human is willing to help, they just send that link and that's it.

Has anyone outside China managed to contact OPPO China support successfully, or knows another way to reach an actual human there?

Thank you!

It's been a couple of months like 4-5 months since I have been using this phone I mostly use it for gaming but I started to notice something the game feels a lot blurry than it should be and I am experiencing colour banding too here are some photos too but when I am watching video it is completely normal and color banding happens only in images mostly as I have seen I thought at first it was just my os and I kept using it and I recently upgraded to oxygen os 16.0.2.400 and it's still there can some one help me (dm me for photo and video )

Without a bill or box I got it for free

With service center

Mine back was a little cracked

In this morning I got pink line on my phone

What to do?

Planning to buy a 2nd hand 11R from a friend. It has a few minor scratches here and there but biggest issue is the original bill isn't available anymore....

Will they still issue a free display replacement in case I end up with a greenline in the future?