iPhone X LTE extremely slow?

iModFrenzy

macrumors 6502a
Original poster
Jan 15, 2015
823
678
Our actions define our legacy
Currently a lot of XS & XS Max users are having LTE issues. I’m not sure whether or not I’m apart of that bandwagon now.

I noticed that my iPhone X has been pretty sluggish over LTE lately, however I don’t know whether to blame AT&T for this since they haven’t been too fantastic either.

iPhone X with “4 bars of LTE” gets around 2-3mbps download and 2-3mbps upload. Something definitely seems off. I tested this against a Verizon iPhone X with “2 bars” at the moment of testing and got around 40-60mbps download and 2-3mbps upload. Which I was baffled to see. Both iPhone Xes are running iOS 12.

Contacted AT&T about it and their support team escalated my issue to a “network issue”. Not sure what that’s gonna do for me but I’m not very hopeful.
 
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d5aqoëp

macrumors 65816
Feb 9, 2016
1,080
1,482
It is very much possible that Apple may have throttled iPhone X so that it’s performance is seen to be lower than XS.
 
Last edited:

Freakonomics101

macrumors 68030
Nov 6, 2014
2,604
1,677
It is very much possible that Apple may have throttled iPhone X so that it’s performance is seen to be lower tgan XS.
It’s bad enough that it’s being throttled because of the lower performance of the 2017 Intel chip.
 

Broken Hope

macrumors 65816
Jan 15, 2015
1,042
769
Yeah my iPhone X definitely looks to be throttled..



Seriously stop with the conspiracy theories.

I have no issues on my X.
 
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AMTYVLE

macrumors 6502a
Sep 23, 2014
601
431
Southeast Florida
My X on AT&T is also having this issue (some days). When on WiFi my download speeds are about 50 Mbps, which is normal being my WiFi plan is 50 Mbps. When I switch to LTE and run a speed test I get only 10 to 12 Mbps, I just ran one now on LTE and pulled in about 35 Mbps. So it's a hit or miss. My X seems to constantly switch between LTE and WiFi a lot too, Safari says "Your iPhone is not connected to the Internet" frequently. Facebook fails to load, etc. I have the Intel X.
 

Eksoccer99

macrumors regular
Mar 19, 2018
217
136
It's been around/explained before. The difference in chips Vzw qualcomm vs ATT/T-Mobile Intel and per their network. (iPhone X). And with XS/Max going Intel. Definitely, an issue somewhere. Hope, it can get fixed with a modem firmware update (towers) b/c I'm really on the fence of dumping ATT and switching to Vzw (ugh). Like the one, some good days some bad days.
 

TokMok3

macrumors 6502a
Aug 22, 2015
623
399
It's been around/explained before. The difference in chips Vzw qualcomm vs ATT/T-Mobile Intel and per their network. (iPhone X). And with XS/Max going Intel. Definitely, an issue somewhere. Hope, it can get fixed with a modem firmware update (towers) b/c I'm really on the fence of dumping ATT and switching to Vzw (ugh). Like the one, some good days some bad days.
How to check if my iPhone X has the Qualcomm or Intel Chip ?
 
Last edited:

Stuey3D

macrumors 6502a
Jul 8, 2014
538
515
Northamptonshire, United Kingdom
Just sounds like bog standard network congestion to me, on o2 in the UK that’s a very common issue.

Some areas I can pull 30Mb at 7AM on 5Bar LTE only to have it drop to 1-2Mb on 5Bar LTE at 11AM when everyone’s devices are using mobile data rather than home WiFi.

Doubt it’s an issue with the phone, more likely just a useless network.

O2 have major issues at large events, where even LTE can grind to a complete halt and the phone drains half its battery trying to send a simple picture message, yet someone on EE next to me can have less signal but is still able to use their device as the network has more towers/better towers.
 

Broken Hope

macrumors 65816
Jan 15, 2015
1,042
769
It's been around/explained before. The difference in chips Vzw qualcomm vs ATT/T-Mobile Intel and per their network. (iPhone X). And with XS/Max going Intel. Definitely, an issue somewhere. Hope, it can get fixed with a modem firmware update (towers) b/c I'm really on the fence of dumping ATT and switching to Vzw (ugh). Like the one, some good days some bad days.
My 140+ test up there is with an Intel modem, try again.
 

Banglazed

macrumors 68040
Apr 17, 2017
3,354
3,560
Cupertino, CA
Before jumping into any conclusion, you should check for network outages or congestion in your area. Even for home internet, there are peak and off peak hours where you’ll get much better download speed during the night than during the day. If it is the device, all you can do is basic troubleshoot. Restart the device or a network reset. Wait for a carrier update or software update to update the modem firmware. Other than that, it would just be a blaming game between carriers and Apple. Submit carrier ticket and submit feedback to Apple to look into it.
 
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