What does a notification about Channel 50 refer to?
I've just started to use a new ZTE Open C. My notifications generally make sense to me but I have two outstanding which refer to Channel 50. They just say: Channel 50
and then there's a 5 digit number below, in my case 01620 and 01362 respectively (the first one from 19h ago and the second from 1d ago).
I'm not aware of any particular problems, though the wifi receiver does seem to have a tendency to get turned off, but I'd like to know what the notifications are about. I hope someone can point me in the right direction.
Great; keep us posted. This is a rather interesting problem.Прочитайте этот ответ в контексте 1
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From your description, it sounds like this could be part of the notifications from the carrier.
In order to better understand and investigate on the issue that you are encountering, please reply to this message with the following information:
- What is the OS version found in the Device Information page? Please visit this link if you need help finding the Build ID of your phone.
- Please provide the exact steps to reproduce the issue you are encountering.
- Who is your current cell phone carrier?
- How often do you encounter this issue?
I would also suggest contacting your carrier directly for assistance, as they may have more insights into the notifications that are being delivered to your phone.
Please be sure to include as much detail as possible, including any websites that may exhibit this issue, and any error messages that you may be receiving, exactly as they appear. This will ensure that we will have all the information needed to investigate into this. Thank you for your help and we look forward to hearing from you!
Thanks for the reply, Ralph, very helpful. It got me loking at the Notifications another way. Since I lodged the query I have, believe it or not, received another 84 notifications of the same type. BUT I now realise that the number shown below the Channel 50 heading is, with one exception, not an error message code as I had imagined, but the area telephone code of a contact. The full number is never given and one of the notifications, one only, has what looks like a hex number: B0182E070381402050431, although even in this there are elements that look as they might have come from a phone book. I'm actually not trying to use the device as a phone at present and the SIM card I've used is an old PAYG one with no balance and which I think I'd need to reactivate with the carrier to get any use out of. While the SIM card does contain some contacts, which I've imported, some of the area codes in the Notifications don't relate to any contact, some are repeated several times while many others in the Contacts do not appear at all in the notifications. And then there's the special number I listed above.
At one time I noted that the phone was continually searching for a phone network so I turned that function off as I don't need it right now. It could be that the notifications started after that. I think too that the notifications occur when the phone is sleeping. After my initial rush to try out everything it's spent more time on standby and the number of notifications has gone up in that time. So, I can't really see that it's directly to do with the carrier because I've disabled that part of the phone setup but I think it is clearly something to do with phone numbers. I don't know if all this is of any help, Ralph, but many thanks for what you've highlighted so far, it's been very helpful. You asked for some more installation details and they are as follows: OS Version is 18.104.22.168 Hardware revision P821A10B01 Platform version 28 Build Identifier 20140505080626
I should add that the SIM Card was issued by Orange, now part of EE. It has not been connected and when I just tried to connect the connection failed, which was what I expected. However, 'Operator Services' are listed as Orange Plus, but I imagine this is just picked up from the SIM card with or without a connection.
I'm curious that only the area codes feature in the notifications (i.e. not full numbers) and of course what a Channel 50 notification actually refers to as well. To get so many is a bit of a nuisance but I see there is a 'Clear All' button if I need it. I'll let them run for now though in case the details need to bechecked to validate anything. Thanks once again for your help and if there's any more info needed I'l be very happy to try to oblige.
Thanks for the additional information. This behavior is indeed strange, and I've never seen or heard about something of this nature.
Do you require the SIM card to be in the phone? Does the problem persist if you take the SIM card out?
If the problem is resolved when you remove the SIM card, I would suggest possibly getting it replaced by the carrier once you need to use it again.
I hope this information is helpful. Please let us know if your problem is resolved, or if you have any other questions.
Thank you once again, Ralph. I inserted the SIM originally because I thought I might need to and it had to go in before the battery so I just put it in anyway.
However, I've now taken it out and run with it for about 6 hours after clearing all the old notifications so it looks as though you're right. There have been no new notifications so 'Channel 50' definitiely seems to be related to the SIM card in some mysterious way.
It's quite an old card anyway so I think it will not be worth trying to explore in more detail so I'm going to put the strange notifications down to some mismatch between a new phone and OS and an old SIM card and call the question solved.
Thank you very much for your help with this. I doubt I'd have ever have realised what the numbers were if you hadn't highlighted the carrier as a possible source. Great stuff.
I think I have to reopen this query. Now that I've taken out the SIM card the number of Channel 50 Notifications has dropped dramatically but I'm still getting about one a day. It's not that much of a nuisance but it would be good to get to the bottom of it. The latest occurred while I was using the browser - just an ordinary news-type item, nothing to do with a telephone number - and this is the first time the phone has been active while one of these notifications has been generated. I suppose we can't rule out that the old SIM has left some traces in the system that is causing the problem to continue? If you have the patience for it some more feedback would be very welcome.
I'm sorry to hear that you are still having issues with Code50 notifications after removing your SIM card.
Please reach out to the manufacturer (ZTE) and the place of purchase so that they can further investigate and attempt to resolve this specific issue. It may also be worthwhile to contact the carrier that the SIM card originally belonged to (Orange), since it's possible that they may have heard about this issue in the past.
I'm sorry that I couldn't be of more help, but please let us know if your problem is resolved, or if you have any other questions about your Firefox OS device.
Many thanks, Ralph. I'll try ZTE support and Orange for some answers.
BUT - I have discovered I'm not alone, and it's not just ZTE or Orange!
Here's another person with the same problem but with an Alcatel Fire and in Brazil: https://support.mozilla.org/en-US/questions/978712
Following this thread through to some Gerrman postings seems to suggest that the Channel notifications are related to certain types of cell broadcasts and people have been able to disable them from Settings.
Which sounds all fine and dandy EXCEPT that I don't have a SIM in, so how am I picking anything up AND because I don't have a SIM in all my settings for mobile phone usage are greyed out, so I can't change anything.
Anyway, it sounds like you were definitely on the right track, namely that it's to do with the mobile network operator. But it also seems there is something about the way Firefox OS deals with certain mobile phone transmissions that causes the notifications to be published.
I shall keep on the trail and report my findings, when I have any.
Meantime, thanks as ever for your interest and advice, it's been excellent to have it - and gives me confidence that the issue should be resolvable.
Sorry to hear that you keep getting these notifications from the carrier. If you still have the SIM card, would you please insert it into the phone and try this:
- Launch the Settings app
- Tap on Messaging Settings
- At the bottom of the page, turn off Cell broadcast
I hope that fixes your problem!
Many thanks for your intervention. It seems a very sensible thing to do and I don't know why I didn't think of it and haven't tried it before. Thank you.
The SIM card had now been reinstalled and the Settings change made and I'll see how it goes for a few days but from the experience of others (see https://support.mozilla.org/en-US/questions/978712 and following) you'd have to believe it should work. I'll feed back in a few days pro or con but hopefully will be marking this as a solution.
Of course, in my simple mind that still leaves the question as to how a carrier could cause notifications to appear on my phone when there's no SIM card installed - and even when there is, it doesn't acknowledge the existence of the SIM.
But many thanks for your interest and your positive proposal. I'm very grateful.
Great; keep us posted. This is a rather interesting problem.
Hi Epicaleb Just a quick follow-up to say that since I disabled 'cell broadcasts' I've had no more Channel 50 Notifications so I think it's fair to say that the problem has been solved. It's also fair to say that it's not actually been explained - and in particular how a cell broadcasts enabled setting could produce a notification in the phone even when there was no SIM card installed. Perhaps that's more of a bug report? Many thanks to you and Ralph for your help with my difficulties. I'm now using the phone with an active SIM card and finding it very suitable for my requirements. Regards peejaymoz
Wonderful; I'm glad that we could help you.