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[SOLVED] - Mobile network data connection drops. Why? (3G/H/H+ dropping connection)

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By arnold.krausz, Member on 11th November 2015, 08:11 PM
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I hope this will help for some people. I found nowhere same solution which works on Samsung Galaxy S5 mini duos phone. The prolem is the following, the phone drops the connection on H+ network after a few seconds. Only the upload arrow blinking but no any traffic.

The solution is the following:
- Open the dialer and type the following code: *#0011#
- Open menu and push Back button (apparently nothing happens)
- Open menu again and press Key input and write to the windows a Q (capital q) (apparently nothing happens)
- Open menu again and press Key input and write to the windows a 0000 (four times zero) (capital q) (apparently nothing happens)
- wait for 15 seconds and the menu will be unlocked!

You should follow the following path below:

Code:
ServiceMode
MAIN MENU
[1] PROTOCOL STATE
[2] UE SETTING & INFO
       UE SETTING&INFO MENU
       [1] SETTING
              UE SETTING MENU
              [1] PROTOCOL
                     UE SETTING PROTOCOL MENU
                     [1] AS
                            AS CONFIGURATION 
                            [1] FREQUENCY LOCK
                            [2] RELEASE VERSION
                                   RELEASE VERSION CONTROL
                                   [1] UE REVISION LEVEL
                                   [2] WCDMA RRC VERSION
                                          RRC(HSPA) CONTROL
                                          [1] R99(HSPA OFF) ()
                                          [2] R5(HSDPA ONLY) ()
                                          [3] R6(HSDPA/HSUPA) ()
                                          [4] R7(HSPA+) ()
                                          [5] R8(HSPA+) (*)
                                   [3] LTE 3GPP REL/CA CONTROL
You have to change the setting from "[5] R8(HSPA+) (*)" to "[3] R6(HSDPA/HSUPA) ()".
After that restart your phone! Check it again, you have to see the star after [3] R6(HSDPA/HSUPA) (*).
And your are done, your phone will use "H" networks only

Tested on:
Code:
Model: SM-G800H
Típus: kmini3g
Név: kmini3gxx
Region: Uzbekistan
Vietnám
Termékkód: SM-800HZWDCAC
CSC-k: CAC
Bootloader: G800HXXU1ANH2
PDA ver: G800HXXU1ANH2
CSC ver: G800HOXE1ANG2
Baseband: 
FIRMWARE: N/A
Build: KOT49H.G800HXXU1ANH2
Build date: 2014.08.04. 21.19.34
Változtatási kód: 2136432
Here is the whole service menu map:
Code:
ServiceMode
MAIN MENU
[1] PROTOCOL STATE
       PROTOCOL MENU
       [1] BASIC INFORMATION
       [2] AS INFORMATION
       [3] ETC
              menu not exist
       [4] NAS INFORMATION
              NAS INFORMATION
              [1] MM INFORMATION
              [2] GPRS INFORMATION
              [3] REJECT INFORMATION
              [4] BACKOFF FPLMN
              [5] SMC RESULT INFO
              [6] CALL END CAUSE
       [5] SIM INFORMATION
              SIM INFORMATION
              [1] GENERAL INFO
              [2] QMI UIM STATUS
              [3] CHECK NV
       [6] PROTOCOL SIMULATION
              PROTOCOL SIMULATION
              [1] KPI
[2] UE SETTING & INFO
       UE SETTING&INFO MENU
       [1] SETTING
              UE SETTING MENU
              [1] PROTOCOL
                     UE SETTING PROTOCOL MENU
                     [1] AS
                            AS CONFIGURATION 
                            [1] FREQUENCY LOCK
                                   FREQUENCY LOCK
                                   [1] WCDMA FREQ LOCK
                                          Current CH: FULL
                                          [1] Set freq full
                                          [2] Set IMT2K BAND Channel
                                          [3] Set PCS 1900 BAND Channel
                                          [4] Set AWS BAND Channel
                                          [5] Set 850 BAND Channel
                                          [6] Set 900 BAND Channel
                                          [7] Set PSC
                                   [2] GSM FREQ LOCK
                                          Current CH: FULL
                                          [1] Set Freq Full
                                          [2] Set EGSM 900 BAND Channel
                                          [3] Set PGSM 900 BAND Channel
                                          [4] Set PCS 1900 BAND Channel
                                          [5] Set DCS 1800 BAND Channel
                                          [6] Set 850 BAND Channel
                                   [3] LTE FREQ LOCK
                                          Current CH: FULL
                                          [1] Set freq full
                                          [2] Set LTE BAND2
                                          [3] Set LTE BAND3
                                          [4] Set LTE BAND4
                                          [5] Set LTE BAND5
                                          [6] Set LTE BAND7
                                          [7] Set LTE BAND17
                                          [8] Set PCI Lock
                                   [4] GSM BARR CONTROL
                                          GSM CELL BARR CHECK is ON
                                          please reboot the phone
                                   [5] CDMA FREQ LOCK
                                          CDMA Channel Lock (TEST_SYS)
                                          Current channel = 1091880
                                          USE 'Key input' of MENU for set
                                   [6] TDSCDMA FREQ LOCK
                                          FEATURE DISABLED -
                                          FREQ_LOCK_TDSCDMA
                                   [7] RESET
                            [2] RELEASE VERSION
                                   RELEASE VERSION CONTROL
                                   [1] UE REVISION LEVEL
                                          REVISION CONTROL
                                          [1] REV LEVEL R99 ()
                                          [2] REV LEVEL R97 ()
                                          [3] REV LEVEL R5 ()
                                          [4] REV LEVEL DYNAMIC (*)
                                   [2] WCDMA RRC VERSION
                                          RRC(HSPA) CONTROL
                                          [1] R99(HSPA OFF) ()
                                          [2] R5(HSDPA ONLY) ()
                                          [3] R6(HSDPA/HSUPA) ()
                                          [4] R7(HSPA+) ()
                                          [5] R8(HSPA+) (*)
                                   [3] LTE 3GPP REL/CA CONTROL
                                          RELEASE VERSION CONTROL
                                          [1] LTE 3GPP REL 9 (*)
                                          [2] LTE 3GPP REL 10 ()
                                          [3] CA ENABLE ()
                                          [4] CA DISABLE (*)
                            [3] DUAL MODE IMPROV.
                                   DUALMODE IMPROVEMENT
                            [4] DRX CONTROL
                                   DRX CONTROL
                                   [1] DRX ON (*)
                                   [2] DRX OFF ()
                            [5] SECURITY CONTROL
                                   SECURITY CONTROL
                                   [1] FAKE SECURITY ON ()
                                   [2] FAKE SECURITY OFF (*)
                                   [3] CIPHERING ON (*)
                                   [4] CIPHERING OFF ()
                                   [5] INTEGRITY ON (*)
                                   [6] INTEGRITY OFF ()
                            [6] AMR CONTROL
                                   AMR CONTROL
                                   [1] WB AMR Status
                                   [2] WB AMR Setting
                                          WB AMR Settring
                                          [1] UMTS WB ENABLE (*)
                                          [2] UMTS WB DISABLE ()
                            [7] LTE FGI FILE CONTROL
                                   LTE FGI FILE CONTROL
                                   [1] FGI FILE STATUS
                                   [2] FGI FILE DELETE
                            [8] ACQ DB DELETE
                                   ACQ DB DELETE
                                   [1] LTE ACQ DB DELETE
                                   [2] WCDMA ACQ DB DELETE
                     [2] NAS
                            NAS CONFIGURATION
                            [1] NETWORK CONTROL
                            [2] AUTO ANSWER
                            [3] SELLOUT SMS
                            [4] DUN ENABLE/DISABLE
                            [5] LTE RELATED SETTINGS
                     [3] CDMA
                            CDMA CONFIGURATION
                            [1] DATA SYNC
                            [2] (UN)BLOCK VOICE MT
                            [3] CHECK FACTORY CMD
                            [4] DATA
                            [5] EHRPD SETTING
                            [6] TEST_SYS
                            [7] RTRE CONFIG
                     [4] GCF
                            GCF CONFIGURATION
                            [1] GSM/(E)GPRS/WCDMA GCF ON
                            [2] CANCEL SETTING (GCF OFF)
                     [5] SIM
                            UE SIM CLASS CONTROL
                            [1] CLASS Status
                            [2] UMTS ON
                            [3] GSM ON
                     [6] GPS
                            GPS CONFIGURATION
                            [1] SMART ASSISTANT
                     [7] IMS
                            IMS CONFIGURATION
                     [8] TDSCDMA
                            TDSCDMA CONFIGURATION
                            [1] COT,RRM SET (NV947,69731)
                            [2] SGLTE SET
              [2] SYSTEM
                     UE SETTINGS SYSTEM MENU #1
                     [1] SIMULATION
                            SIMULATION MENU
                            [1] MODEM ASSERT(RESET)
                            [2] SW WATCHDOG
                            [3] HW WATCHDOG
                     [2] FORCE EFS_SYNC
                            SYNC success. please reboot
                     [3] NV REBUILD
                            NV REBUILD MENU
                            [1] PROTOCOL, GPS, IMS NV
                            [2] SYSTEM STATIC NV ONLY
                            [3] ALL
                     [4] NV BACKUP TEST
                     [5] QXDM QUICK LOGGING TEST
                     [6] DIVERSITY CONTROL
                            DIVERSITY CONTROL MENU
                            [1] CDMA DIVERSITY CONTROL
                            [1] UMTS DIVERSITY CONTROL
                            [1] LTE DIVERSITY ONLY TEST
                     [7] SAR BACKOFF(SENSORS)
                            SAR BACKOFF MENU
                            [1] SAR BACKOFF FLAG
                            [2] SET SAR STATE
                     [8] SECUREBOOT STATUS
                            SECURE BOOT STATUS
                            Not support
                     [9] NEXT PAGE ->
                            UE SETTING SYSTEM MENU #2
                            [1] DIAG CONTROL
                                   DIAG CONFIG
                                   Not Support
                            [2] HSIC TEST
                                   HSIC TEST
                                   Not Support
                            [3] AUDIO
                                   AUDIO MENU
                                   [1] Push ACDB
                            [4] Ramdump Mode ON/OFF
                                   Ramdump Mode ON/OFF
                                   Not Support
                            [5] SS EFS Log
                                   SS EFS Log
                                   Not Support
                            [6] LTE TXPL DEBUG ON/OFF
                                   LTE TXPL Debug On/Off
                                   [1] LTE TXPL DEBUG ENABLE()
                                   [2] LTE TXPL DEBUG DISABLE(*)
       [2] INFORMATION
              UE INFO MENU
              [1] SW VERSION
                     SW VERSION MENU
                     [1] READ IMEI
                     [2] READ IMSI
                     [3] READ SW VERSION
                     [4] READ FTA SW VERSION
                     [5] READ ALL SW VERSION
              [2] HW VERSION
                     HW VERSION MENU
                     [1] READ HW VERSION
                     [2] READ FTA HW VERSION
              [3] CAL INFO
                     CAL INFO MENU
                     RF Cal Date : 2014.04.09
                     CAL DONE w SS PGM
                     [1] XO CAL INFORMATION
                     [2] RF CAL MODE (ET/APT)
                     [3] INTERNAL DEVICE CAL
[3] ETC
       ETC MENU
[4] DEBUG SCREEN(OPEN)
       DEBUG SCREEN
       [1] BASIC INFORMATION
       [2] NAS INFORMATION
       [3] AS INFORMATION
       [4] SIM INFORMATION
       [5] CDMA DEBUG INFORMATION
       [6] WB-AMR
You can read this in Hungarian language on my blog:
http://blog.arnoldweb.hu/2015/11/sam...ese-h-helyett/
The Following User Says Thank You to arnold.krausz For This Useful Post: [ View ] Gift arnold.krausz Ad-Free
12th November 2015, 07:57 AM |#2  
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My cousin have S5 and from time to time, his data connection keep dropping. This solution might work out for him... Thanks for sharing.
12th November 2015, 11:14 AM |#3  
arnold.krausz's Avatar
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Quote:
Originally Posted by greendev101

My cousin have S5 and from time to time, his data connection keep dropping. This solution might work out for him... Thanks for sharing.

I hope will help! Keep me posted please!
8th February 2016, 06:11 PM |#4  
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Very strange, It worked for me but somehow after changing i cant enter The menu again. Any ideas?
20th February 2016, 08:28 PM |#5  
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Quote:
Originally Posted by TroyHGV

Very strange, It worked for me but somehow after changing i cant enter The menu again. Any ideas?


I have no idea. I could enter to menu every time when I tried. Restart maybe will solve it.

Sent from my SM-G900F using XDA Forums
24th February 2016, 07:24 PM |#6  
Android2003's Avatar
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Thanks a lot.
Working fine for my g901F S5 LTE+
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3g/h/h+ dropping connection, mobile network data connection drops. why?, s5 mini duos

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