WiFi Speeds (iPhone 12 Pro Max)

I went to Genius bar at Apple Store. The Apple support staff tested with me few sets of iphone 12 pro max including the new replacement set. All show slow wifi speed. The iphone 12/pro ( not max) performed normal compared to the pro max. So there is no point to replace with new set. They are going to raise feedback to Engineering regarding pro max. Will need to wait some time to see what’s the next step.

The problem does seem to me to centre around the WiFi system, I did find a AX 5G band modem where my 12 Pro Max was the same download speed as other older IOS devices, but only one WiFi modem so far.

My down load speed (upload is the same) n 2013 modem on the 5G band is about 20% slower, my modem has a local WiFi speed test to the modem (once the App was updated to work) which shows 350Mbits download where the internet speed max out at 50Mbit on my ISP plan which is where the differences in download speed show up -20%.

Maybe Apple are having trouble with the new modem Qualcomm chip-set and the various modem standards.

I have the exact same problem. 50-50Mbos download is the max I get with my ATT iPhone with a dual sim/eSim iPhone 12 Pro Max. Router is fine. Did all recommended trouble shooting with router reset network settings rebooted router etc etc. Compared to another iPhone 12 Pro Max on same network test conditions same speed test server and that 12 pro max gets 500+ down and 40+ upload. Brought phone back yesterday and they swapped it under Apple Care+. Restored last night and this morning same exact problem again, duplicate side by side comparison results. The only difference we can find is one phone has dual SIMS the other does not. Turned off all cellular plans comparing only Wi-Fi speeds , same results. Any help appreciated - no apps running in background - running iOS 14.3 latest update. It’s very frustrating to see such disparate performance between identical devices side by side

The iPhone 12 Pro Max is getting very low WiFi connection speed (1-3mbps) compared to the iPhone XS Max (>60mbps) and iPhone 7 Plus connection speed (>60mbps). I reset network connection on the 12 Pro Max and the speed increased to 46mbps temporarily, but this issue keeps recurring.

avongugg wrote:

when you are away from WiFi its best to turn WiFi off as the phone is constantly looking for it, that’s why when you turn WiFi off sometimes things stabilize.

That is not correct. It is best to leave Wi-Fi on all the time. First, the phone is not constantly “looking” for it. It does listen for WiFi networks, both to connect if it recognizes a known one, but primarily to refine location services. But as it is just listening it uses little power. GPS only works outdoors with a clear view of the sky, so indoors or amidst tall buildings it uses known WiFi networks to determine where it is.

Then WiFi is off anyway most of the time when the phone is locked, so turning it off is redundant.

If you expect to be able to locate a lost or stolen phone using FindMe you need WiFi to be on for location services to work.

Brand new iPhone 12 Pro Max. Latest iOS. Running 100 mbps internet via Apple AirPort Extreme with latest software. Phone constantly drops from 100 mbps to 2 mbps or even slower, like 500k! If I switch the WiFi off, phone reverts to wireless network and gets 100 mbps via Verizon! Yet that eats into my data allowance. All other devices, including iPhone 6s Plus, MacBook, iMac, Apple TV, all able to hit 100 mbps download speeds.

Apple, you have a serious problem! This thread is now 20 pages long! You have to fix your hardware and/or software! Not a single response here with a solution!

I have been wondering why my new iPhone 12 Pro max seems to be slow even when I connect to wifi...simple test last night in the same spot in my house.

Test conditions:

Netgear Orbi RBR50, latest firmware

IPhone 12 pro max, latest iOS

Galaxy S21, latest firmware

Both devices connected to my home wifi with a strong signal, 25ft away from the node.

Results...iphone 12 pro max: varies 40-100 mbps

S21: 250+ mbps

I tried airplane mode with wifi connection, low data more, forget network and reconnect, privacy>system>network services off...none of them improves the network speed.

In a general sense it appears that my iPhone 12 prefers the connection to the slower 2.4ghz vs the faster 5ghz even though both signals are good. There is no setting to force it to connect to the faster frequency so I'm stuck with a new device that prefers a slow network. We won't see any improvement until Apple acknowledges the issue and fixes it in a future iOS update.

BTW, this is such a 2017 problem...didn't think I'd see it in a 2021 flagship phone.

Not an issue per se.

Apple's Wi-Fi drivers take a wide variety of factors into account when deciding which access point to connect to. It's not just the speed of the connection but a complex calculation involving the speed of the connection, the noise on the connection and signal levels.

Just connecting to the strongest signal, or the fastest connection wouldn't necessarily provide the optimal customer experience.

The easy way to work around this is to make your 2.4 GHz and 5 GHz SSIDs different from each other, then you can connect to the precise frequency that you want.

Before I contact Apple support directly, I looked around here and found so many people with same problem. So yes, if the issue repeats next step would be to contact Apple support.

I don’t see any Routing issue in picture here as when I tested with wifisweetspot, I tested the speed between iPhone and router i.e., point to point connection with no Routing. Anyway, thanks!

August 2021, Iphone max i am having this problem, 50% slower than a google pixel phone, i have had to separate my wifi bands, its not acceptable apple, the phone gravitates to the 2.4ghz signal, there should be a software update by now to allow us to turn off 2.4. wifes iphone 12 always goes for 5ghz, it has to be a modem issue, those with routers that wont let you separate bands must be very frustrated, waited years for 600mbs fibre, totally wasted with iphone 12 max

I am less than 10 feet away at most times. I am using an Apple Airport tIme capsule 802.11ac.

See if there’s a software update for the time capsule.

This option worked for me. I've got an Eero 6 so don't have the 2.4/5 option. Not sure how risky it is to turn off the private address so here's hoping Apple has a fix in the works.

No I meant flipping off the private address setting on the IPhone itself. That is what’s working for me right now.

I have the USA version of 12 Pro Max, I wonder if it has something to do with the extra antenna ...