LTE/5G very slow afte upgradint to iphone 13 pro max

Have you contacted your cellular carrier about it?

If you believe there is an issue with your phone, take it in to be examined:

Genius Bar Reservation and Apple Support Options - Apple

Millions of other iPhone 11 issues have no such problems.

Speeds are completely controlled by your cellular provider based upon your rate plan, congestion at your cell tower, your data usage to date, etc.

Were this a universal issue, we would see many, many more complaints here.

For example, this is pretty much what I've seen for years across multiple iPhones:

not sure if related, but i felt like having some slowness of my 4G when i was on iOS 15. upgraded to 15.1 seems to have fix it. Not sure whether it was my telco problem at that point of time or was it just the iOS version. I cant confirm this. Are you on iOS15.1?

1. Verizon told me it was a “known issue.“

2. I see the same issue being discussed on the other carriers.

3. Upgrading to 15.1 made it slightly better, but as others have mentioned it seems to vary from time to time and place to place.

4. Each time it happens (bad data transfer with good cell signal) I do a speed test and take a screenshot. It is crazy how slow it can be, between one and three down.

Here’s a screenshot from one today that had three bars of 5G:

I’m glad you go lucky with a good phone. Must be manufacturing variation or tolerance variation. Only thing I can think of is gather the screenshots and recordings and go to apple store see if they will do an exchange. I’ll let everyone with the issue know how it goes.

The new sim was supplied with the iphone 13. The sim can not connect to 5g or show 5g or 5g uw if it is not a 5g capable SIM, which it currently does sometimes, or when wifi is toggled as described. There have been many troubleshooting efforts, including reseting network settings, new sim, new phone, technician sent out to the tower, verizon confirmation tower is optimized for the 5g and 5g uw and the iphone 13. 5G phones still show 4g, LTE option, as often one of the first things they tell you to try is to diable 5g auto, and default back to 4g. There are no 5g only phones currently.

Just because you haven't experienced it on AT&T doesn't mean no one is, in fact the other person dogcow-moo here is claiming its carrier issues and all carriers are having issues depending on their tower/band optimizations (which again Verizon already confirmed tower is already optimized for 5g and for iphone 13 in this area, and already sent a tech out for wind damage and repair, and no change ). The fact that not all users are experiencing this in the area, also suggests its the phone and not the carrier.

I'll try this again without any "offensive" stuff;

Reset network settings, replaced sim card, tried data roaming on and off, tried just

using LTE, WIFI on and off, tried remote diagnostic with Apple, had diagnostic at

the Apple store, restored my phone to factory settings without any of my data

or apps to make sure something wasn't interfering, switched carriers, had the

phone replaced with a new one and went through everything again, and no luck.

The iPhone 13 pro Max does not work and I don't know how to point things out,

but Apple won't let me downgrade to another model or take mine back because I spent over the time limit trying to

get it to work. Their only suggestion was to try and sell it on my own and buy

something else.

Despite what your carrier claims, most often they have not done a truck roll but rather have run diagnostics on the BSC.

If you travel to another part of town or another town, do you have the same issues?

Everything in the cellular network is shared among hundreds of devices.

If you get 5G UW one time and not another it could be because the UW node is at capacity, or is otherwise overloaded so you get shunted to a frequency/technology where there is an open slot.

The S20 and iPhone 13 Pro Max likely have different frequency capabilities; certainly the 12 Pro Max and 13 Pro Max do, and Samsung doesn’t list the frequencies they support.

So yes, the carrier sees the diagnostics, and everything looks great to the BSC. They send out a tech and the tech may also see the same. Unless the tech has RF gear and plots a signal map for the surrounding area they may not know about issues in the area from tree leaves in the summer (a big issue when the site was installed and configured in winter) to a new house that was built to new interference in the area, perhaps from a competitor’s new cell tower.

The tower doesn’t choose to tell your phone to use a frequency it can’t use properly, it doesn’t know. For example, if the tower had no antennas connected at all, the BSC would have no way of knowing that; as far as it was concerned as soon as phones were assigned a frequency their users didn’t do anything further with their phones.

Certainly there can be issues with the phone but it is unlikely most would have no issues were that the case.

Similarly if you do an Internet search you will find similar complaints from owners of Google and Samsung phones.

Do I wish iPhones displayed more diagnostic data about which cell frequency they are using and signal levels? Yes, I definitely do, but it turns out cell providers want that information kept away from individual users as they know most users aren’t properly trained to assess the data and don’t want calls from customers when their RSSI drops from -70 dBm to -75 dBm as they don’t understand even a change in ambient humidity can cause signal drops like that.

(As an aside, auto makers treat drivers in much the same way. Today if a vehicle has an oil pressure gauge rather than a warning light, it’s likely just programmed to show low and middle of gauge readings, as when they showed actual readings dealerships were overwhelmed by calls from owners who didn’t realize how much oil pressure normally fluctuates due to ambient temperature, oil temperature and engine RPM.)

Again, you're describing a carrier issue.

The carrier is responsible for speeds between their towers and the Internet, and congestion dictates backhaul speeds.

Especially with the focus on 5G it wouldn't surprise me if carriers are programming their switches to deprioritize LTE traffic.

It's not just a matter of cellular frequency congestion, it's also about the bandwidth of the backhaul from the tower to the Internet.

Check with your cellular carrier; these are excellent results:

Were your supposition true, that might be the case, however it is demonstrably not true that "every 13 Pro Max" is having a speed issue.

Contact your carrier.

Same issue here. 5G speeds are hardly hitting 20 when they used to get over 100. On uploads it’s even worse, I’m hardly getting 1 when ion my 12 Pro Max it was in the 30’s. Both also seem erratic and not steady. Lots of fluctuations. I’m on ATT with strong 5G signal. I turned 5G off and LTE was about the same on download but faster on uploads. Maybe a carrier update is needed for these new phones?