5G Not stable, frequent disconnection with 5-10 seconds disturbances
I do notice frequent disconnection/connection on 5G network, reconnect takes 5-15 seconds. Syslog shows below messages.
2024-12-11 18:18:22 [3] LTE: Exception:GetMobileStatus fail
2024-12-11 18:18:27 [3] LTE: Exception:item length too long(1034)
2024-12-11 18:18:27 [3] LTE: Exception:GetMobileStatus fail
2024-12-11 18:18:33 [5] LTE: SIM plugged.
2024-12-11 18:18:33 [5] LTE: Not registered, searching!
2024-12-11 18:18:36 [5] LTE: Registered with a network!
2024-12-11 18:18:36 [5] LTE: Network type is NR.
2024-12-11 18:18:36 [5] LTE: network changed: 0,0->420,1
2024-12-11 18:18:36 [5] LTE: Start connecting to the network!
2024-12-11 18:18:36 [5] LTE: Fail to connect to the network, start autoconnect!
2024-12-11 18:18:38 [5] LTE: Connected to the network!
Device used in KSA with STC network, Netowrk bands B1,B3,N40,N78. Normal operation device alternates between 5G/4G with no error (led white/green) but Exception conditions syslog as above messages.
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Hi, thanks for posting question here.
First, it is suggested to insert the same SIM into another LTE device or even a smartphone, then monitor for some time to confirm if the internet works fine and is stable.
Or if possible, you may insert another sim card to compare.
And you may refer to this guide to change DNS for try.
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1. The SIM is in use for 3 years on Android phone (Moto G 5G, Samsung M23) as USB/Ethernet Tethering to Mesh Router
2. Current Location also tried same phones and no issues , NX200 was swapped for missing band and CA on 5G
3. DNS is same for 5G and 4G+, device doesn't suffer "Exception" conditions on LTE-Plus
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Hi, to assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay attention to your email box for follow-up.
Welcome to update solution here once the problem is resolved.
Thank you!
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Thanks @Marvin_S,
I shared multiple logs and waiting for feedback.
I reverted to old firmware "Firmware Version: 1.1.0 3.0.0 v60a2.0 Build 240519 Rel.754n" and could see different behavior with same 10 seconds delays.
2016-01-01 08:16:32 [5] LTE: SIM plugged.
2016-01-01 08:16:33 [3] LTE: Exception:archive length too short(0)
2016-01-01 08:16:33 [5] LTE: Not registered, searching!
2016-01-01 08:16:34 [5] LTE: Registered with a network!
2016-01-01 08:16:34 [5] LTE: Network type is LTE.
2016-01-01 08:16:34 [5] LTE: network changed: 0,0->420,1
2016-01-01 08:16:34 [5] LTE: Start connecting to the network!
2016-01-01 08:16:34 [5] LTE: Fail to connect to the network, start autoconnect!
2016-01-01 08:16:34 [5] LTE: Network type is NR.
2016-01-01 08:16:36 [5] LTE: Connected to the network!
2024-12-20 13:26:38 [5] LTE: Network type is LTE PLUS.
2024-12-20 13:26:48 [5] LTE: Network type is NR.
2024-12-20 16:57:22 [5] LTE: Network type is LTE PLUS.
2024-12-20 16:57:32 [5] LTE: Network type is NR.
2024-12-20 17:05:02 [5] LTE: Network type is LTE PLUS.
2024-12-20 17:05:12 [5] LTE: Network type is NR.
Restart of CPE SIM registration to 5G NR take 4 seconds, during normal operation LTE-PLUS to 5G NR takes 10 seconds on every switchover.
Changed Firmware Version: 1.2.0 3.0.0 v60a2.0 Build 240613 Rel.62450n and also 1.3.0 3.0.0 v60a2.0 Build 240627 Rel.48750n, the errors are back
2024-12-21 11:40:56 [3] LTE: Exception:SendAtCommand fail
2024-12-21 11:41:02 [5] LTE: SIM plugged.
2024-12-21 11:41:02 [5] LTE: Not registered, searching!
2024-12-21 11:41:03 [5] LTE: Registered with a network!
2024-12-21 11:41:03 [5] LTE: Network type is LTE.
2024-12-21 11:41:03 [5] LTE: network changed: 0,0->420,1
2024-12-21 11:41:03 [5] LTE: Start connecting to the network!
2024-12-21 11:41:03 [5] LTE: Network type is LTE PLUS.
2024-12-21 11:41:03 [5] LTE: Fail to connect to the network, start autoconnect!
2024-12-21 11:41:04 [5] LTE: Network type is NR.
2024-12-21 11:41:05 [5] LTE: Connected to the network!
2024-12-21 11:42:56 [5] LTE: Network type is LTE.
2024-12-21 11:42:56 [5] LTE: Network type is LTE PLUS.
2024-12-21 11:42:57 [5] LTE: Network type is NR.
2024-12-21 11:45:26 [5] LTE: Network type is LTE.
2024-12-21 11:45:26 [5] LTE: Network type is LTE PLUS.
2024-12-21 11:45:26 [5] LTE: Network type is NR.
2024-12-21 11:45:57 [5] LTE: Network type is LTE.
2024-12-21 11:45:57 [5] LTE: Network type is LTE PLUS.
2024-12-21 11:45:57 [5] LTE: Network type is NR.
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Hi, thanks for your update here.
I saw that you also share same log to the senior support, it is suggested to wait for their further research and response.
Thank you and best regards.
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same problem here, have you already found a solution? which provider do you have? use o2 telefonica.- Copy Link
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Still no. I am still tracing and sharing information with support.
If you are getting same exception error, I suggest to open support ticket.
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I doubt, I reproduced the issue multiple times (varying times) and nailed specific to 5G/4G mode only. I get two bands N77 and N40+N78 and CPE alternates frequently, the signal levels are much stronger for N40+N78 -76 to -89db still N77 -90 to -101db prefered. The devices has been moved to different places within house and now placed at very strong signal area.
I shared log details with support, still being worked.
Power issue i noticed with smart charger having frequent disconnect on samsung mobile while tethering.
Yasin
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