ZTE Z970 Connecting...Error writing to serial port - GSM-Forum

savanaunlok · 11-20-2019, 09:38

Hello, trying to unlock ZTE Z970 but consistently give this error
Modem firmware has been downgraded to allow for unlock

^ ZTE Handset ADB Interface
Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016
Phone model: zte Z970
Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016
Version: Z970V1.0.0B35
Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1
Obtaining root privileges...NO
Preparing....Reconnect phone and try again
--------- 2019-11-19 17:49:04 ---------
SigmaKey 2.34.00b2 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ZTE Handset ADB Interface
Connecting...Error writing to serial port

GSM_Support · 11-20-2019, 09:55

@ savanaunlok,

Root your phone and repeat unlock operation according to the manual.
Here you can find successful report on an unlock operation fo the ZTE Z970 with the same firmware version.

Best Regards
GSMServer team

savanaunlok · 11-20-2019, 10:07

Hello Sir, already rooted phone and installed twrp and downgraded modem via custom recovery but still keeps on getting this error [Connecting...Error writing to serial port]

savanaunlok · 11-20-2019, 10:18

SigmaKey v.2.34.03
xxxxxxxxx Sigma dongle 2.34, Initializing...OK
Pack 1: Activated
Pack 2: Activated
Pack 3: Activated
Pack 4: Not activated
--------- 2019-11-20 09:15:36 ---------
SigmaKey 2.34.03 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ZTE Handset ADB Interface <<<<<<
Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016
Phone model: zte Z970
Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016
Version: Z970V1.0.0B35
Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1
Obtaining root privileges...NO
Preparing....Reconnect phone and try again
--------- 2019-11-20 09:17:31 ---------
SigmaKey 2.34.03 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ZTE Handset ADB Interface <<<<<<
Connecting...Error writing to serial port

savanaunlok · 11-20-2019, 11:41

SigmaKey 2.34.03 ADB: Direct unlock
* daemon not running. starting it now *
* daemon started successfully *
^ ZTE Handset ADB Interface
Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016
Phone model: zte Z970
Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016
Version: Z970V1.0.0B35
Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1
Baseband Processor: Qualcomm MSM8926
Date: Dec 22 2014 14:27:26, Jul 16 2014 23:00:00, DAAAANAZ
Software IMEI: 864507021598627
Security area saved to "C:\Users\Savanna\Documents\SigmaKey\security backup\0136277030\864507021598627_zte_Z970_KTU84P. skb"
Unlocking phone.....Done
Restarting phone...Done

11-20-2019, 09:38	#1 (permalink)
savanaunlok Freak Poster Join Date: Nov 2016 Location: Everywhere Posts: 252 Member: 2647496 Status: Offline Thanks Meter: 40	ZTE Z970 Connecting...Error writing to serial port Hello, trying to unlock ZTE Z970 but consistently give this error Modem firmware has been downgraded to allow for unlock ^ ZTE Handset ADB Interface Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016 Phone model: zte Z970 Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016 Version: Z970V1.0.0B35 Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1 Obtaining root privileges...NO Preparing....Reconnect phone and try again --------- 2019-11-19 17:49:04 --------- SigmaKey 2.34.00b2 ADB: Direct unlock * daemon not running. starting it now * * daemon started successfully * ^ ZTE Handset ADB Interface Connecting...Error writing to serial port

11-20-2019, 10:18	#4 (permalink)
savanaunlok Freak Poster Join Date: Nov 2016 Location: Everywhere Posts: 252 Member: 2647496 Status: Offline Thanks Meter: 40	Tried also new software but still same SigmaKey v.2.34.03 xxxxxxxxx Sigma dongle 2.34, Initializing...OK Pack 1: Activated Pack 2: Activated Pack 3: Activated Pack 4: Not activated --------- 2019-11-20 09:15:36 --------- SigmaKey 2.34.03 ADB: Direct unlock * daemon not running. starting it now * * daemon started successfully * ^ ZTE Handset ADB Interface <<<<<< Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016 Phone model: zte Z970 Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016 Version: Z970V1.0.0B35 Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1 Obtaining root privileges...NO Preparing....Reconnect phone and try again --------- 2019-11-20 09:17:31 --------- SigmaKey 2.34.03 ADB: Direct unlock * daemon not running. starting it now * * daemon started successfully * ^ ZTE Handset ADB Interface <<<<<< Connecting...Error writing to serial port Last edited by savanaunlok; 11-20-2019 at 10:25.

11-20-2019, 11:41	#5 (permalink)
savanaunlok Freak Poster Join Date: Nov 2016 Location: Everywhere Posts: 252 Member: 2647496 Status: Offline Thanks Meter: 40	Done SigmaKey 2.34.03 ADB: Direct unlock * daemon not running. starting it now * * daemon started successfully * ^ ZTE Handset ADB Interface Version: Linux version 3.4.0-ga0dde4d-00076-g4f04fef (xueyibing@scm12) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Fri Nov 4 11:25:02 CST 2016 Phone model: zte Z970 Android 4.4.4; Firmware: KTU84P; Date: Fri Nov 4 11:00:30 CST 2016 Version: Z970V1.0.0B35 Baseband Firmware: 0.1.c1.18-00005-M8926DAAAANAZM-1 Baseband Processor: Qualcomm MSM8926 Date: Dec 22 2014 14:27:26, Jul 16 2014 23:00:00, DAAAANAZ Software IMEI: 864507021598627 Security area saved to "C:\Users\Savanna\Documents\SigmaKey\security backup\0136277030\864507021598627_zte_Z970_KTU84P. skb" Unlocking phone.....Done Restarting phone...Done

11-20-2019, 09:55	#2 (permalink)
GSM_Support Product Supporter Join Date: Feb 2005 Location: GSMserver Team Posts: 36,980 Member: 121052 Status: Offline Sonork: 100.107126 Thanks Meter: 80,766	@ savanaunlok, Root your phone and repeat unlock operation according to the manual. Here you can find successful report on an unlock operation fo the ZTE Z970 with the same firmware version. Best Regards GSMServer team

11-20-2019, 10:07	#3 (permalink)
savanaunlok Freak Poster Join Date: Nov 2016 Location: Everywhere Posts: 252 Member: 2647496 Status: Offline Thanks Meter: 40	Hello Sir, already rooted phone and installed twrp and downgraded modem via custom recovery but still keeps on getting this error [Connecting...Error writing to serial port]