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Mi5 reports Cat4/Cat6 LTE capability instead of announced Cat12/Cat13

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2258 7 |
19:51, Jul-08-2016 | From PC
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Go to reply no.
Device
Mi 5
MIUI Version
V7.5.2.0.MAAMIDE
Reproduce rate
100%
ROM version
Global Stable ROM
Country/Region
Russia
Description
Phone reports Cat 4/Cat6 (300/50 Mbps) LTE capability instead of announced Cat12/Cat13 (600/150 Mbps).
Steps to reproduce
Phone registration in LTE network, check ueCapabilityInformation message
Screenshot
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Log
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Dear Xiaomi tech team!

I have Xiaomi Mi5 3GB/32GB from China, white version, with latest Global stabe MIUI.
It's been widely announced that the phone is Cat12/Cat13 LTE capable, which means 600 Mbps in DL and 150 Mbps in UL, due to Qualcomm's X 12 modem on board, capable of 3 x CC carrier aggregation, 4 x 4 MIMO and 256QAM support.
However, while testing throughput with Speedtest.net application  (4G+ etwork is not widely spread in the place where I live) I couldn't see much difference in the air interface speed between Mi 5 and iPhone 5s, Cat3 capable phone.
I got to a lab, where colleagues of mine managed to trace signalling messaged flying back and forth between the network and the phone in the radio interface. This is what they figured out.
Upon receiving ueCapabilityEnquiry message from the network, the phone replies back with ueCapabilityInformation message. As you can see below, the phone tells to the network that it is only Cat 4/ Cat 6 capable and no sign of Cat 12/Cat 13 support is available. Please find excerpt from ueCapabilityInformation message below:


  • RRC-MSG     
  • RRC-MSG     
  • msg
  • struUL-DCCH-Message     
  • struUL-DCCH-Message     
  • message     
  • c1
  • ueCapabilityInformation     
  • rrc-TransactionIdentifier     : ---- 0x1(1) ---- *****01*
  • criticalExtensions     
  • c1
  • ueCapabilityInformation-r8     
  • ue-CapabilityRAT-ContainerList     
  • UE-CapabilityRAT-Container     
  • rat-Type     : ---- eutra(0) ---- 0000****
  • ueCapabilityRAT-Container     
  • ueEutraCap     
  • UE-EUTRA-Capability     
  • accessStratumRelease     : ---- spare5(3) ---- ******0011******
ue-Category : ---- 0x4(4) ---- **011***


...



  • UE-EUTRA-Capability-v9a0-IEs     
  • featureGroupIndRel9Add-r9     : ---- '11000000000000000000000000000000'B ----     ****11000000000000000000000000000000****
  • nonCriticalExtension     
  • ue-Category-v1020     : ---- 0x6(6) ---- *00*****


The baseband version is TH20c1.9-0628_1725_75a5ef7,
Kernel version 3.18.20-perf-g4a3fa7f
Build number MRA58K


Please explain as to why lower capability is reported by the phone to the network and how to fix the problem?


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moein66 + 2 Great!

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00:13, Jul-13-2016 | Via mobile
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I confirm the issue.

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Unlock MedalMi Power BankFlashholicI Love MIUIMIUI 2016MIUI Fan From SingaporeMIUI Fan from MalaysiaMIUI 300 Weeks1900K Forum MembersI Love Mi BunnyMiPopSurpriseMIUI Android 4.4 KitKatDebate MasterMi Story TellerForum Contest LoverDie-hard MIUI FanMIUI KingAndroid Elf

10:15, Jan-02-2017 | From PC
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bump* can confirm this

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10:36, Jan-02-2017 | From Redmi 3S
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give details of ur wireless AP

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02:50, Feb-21-2017 | From PC
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i have same problem .lte+ not work. other phone have lte+ but i have not.  i see in xiaomi website 32 gig version have 2*CA and 64/128 have 3*CA(Carrier Aggregation) . 64/128 have cat 12 but 32 i dont know Maybe cat6 . but with cat6 must have lte+.my country operator band 1800 , 2600 and lte+ must work but i dont know Why not work..

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Unlock MedalMi Power BankFlashholicI Love MIUIMIUI 2016MIUI Fan From SingaporeMIUI Fan from MalaysiaMIUI 300 Weeks1900K Forum MembersI Love Mi BunnyMiPopSurpriseMIUI Android 4.4 KitKatDebate MasterMi Story TellerForum Contest LoverDie-hard MIUI FanMIUI KingAndroid Elf

21:57, Dec-29-2017 | From PC
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bump, 2017 and still unsolved.

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11:03, May-09-2018 | From PC
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dimapl24 I know it's a 2 year old post, but do you still have the full ueCapabilityInformation message?

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15:40, Jul-01-2018 | From PC
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This post was edited by moein66 at 15:42, Jul-01-2018

https://en.wikipedia.org/wiki/Li ... LTE_Advanced#Xiaomi
the above link show xiaomi defraud all customers
i saied this matter several time but no one care about this matter
i test my mi 5s plus with signal network guru and i find no carrier aggracation on my phone (my oprator support ca on band b3 & b7.
i never buy aggain xiaomi phones and i tell this matter to all people on my country to never buying xiaomi phone
shame on xiaomi for defrauding there customers
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