Bought Norton 360 with Multi-Device. Installed mobile security with no problem on three devices. Two cell phones and one tablet.On the Two cell phones, both won't let me back up. I have tried both on wifi and on cell service. On the home page of Norton the backup tab says "need Backup." When you select "need backup," I get service is not available.
Hi chrystal97
It is most likely a temporary Norton server issue that will resolve
it's self.
Perhaps try the Backup option again in 12 - 24 hours.
Keep us posted on how you go.
Cheers. 
My backup service is also unavailable.This situation continued for two days.
PS:I'm in China
Hi sunsry Welcome to The Norton Community.
Thank you for reporting the issue and your location to the Community
forum your feedback is much appreciated.
As this is now obviously not an isolated case as forum members chrystal97
and also PedroUK are having a similar issue i will go ahead and report it to
the Norton Team.
As it is still the weekend i guess it might take a little bit of time for Norton to
look into this problem.
But there is also a chance it might be resolved soon by the Norton Techs.
Try the Backup feature from time to time and see if it is working or not and
if it is still not working in another 24 hours or so please return to the forums
to let us know. :)
Keep an eye on this thread for any updates on the issue.
Cheers.
Hi chrystal97
chrystal97 wrote -
Bought Norton 360 with Multi-Device. Installed mobile security with no problem on three devices. Two cell phones and one tablet.On the Two cell phones, both won't let me back up. I have tried both on wifi and on cell service. On the home page of Norton the backup tab says "need Backup." When you select "need backup," I get service is not available.
Just a question for you being what region or country are you in
as this info might help the Norton Team.?
This is only if you are still encountering the same problem with the
Norton Mobile Security (NMS) Backup feature.
And what version of NMS do you have installed.?
Many thanks. :)
Cheers.
Thank you for your response.
Hi sunsry and chrystal97
Quick Update on the Backup Unavailable issue.
The issue with the Norton servers should now be fixed.
If you could now run the Backup feature of Norton Mobile Security to make sure
it is all ok and running properly.
Keep us posted on how you go as the info you supply is much appreciated and
will help others who have had or have the same issue. :)
Cheers.
it's available now.Thank you
Hi sunsry
No worries glad to help.
That is great news and thank you for letting us know that it is now
working fine. :)
Cheers.
I have had this issue continually for over a month now and it remains unresolved. Any suggestions?
Hi Dopplerdon.
Welcome to the Norton Community Forums. 
Sorry you are having a problem.
Can you tell us which version of Norton Mobile Security you are using (and which version of Android)? It may also help if you could tell us which country you are based in.
I assume that you have a good WiFi connection when you try this but can you confirm this or tell us how you are connecting to the internet?
Hopefully your reply will give us some ideas as to how you can best be helped.
I am using NMS V3.3.4.972 and the OS is Android 4.1.2
In the US and primairaily use 4G and almost never use WiFi, but if I do, I am in the same room and less than 20 ft away from the access point (line of site).
Thanks for any help. Worked fine up to about a month ago. Log shows stopped working on 4/18 : "Backup and Restore - Preparing server for account failed".
Hi Dopplerdon
Have you tried uninstalling and reinstalling the Norton Mobile Security app.
If you start off fresh it might fix the issue you have.
Keep us posted.
Cheers.
Cleared stored data, uninstalled, rebooted, re-installed, live updated..... Still the same message.
Hello again Dopplerdon.
smithy is having some communication problems so you are back with me again...
I am puzzled as this issue appeared to have been solved with a recent update.
Can you tell us what device you are using?
Can you confirm that you are able to log on the the mobilesecurity.norton.com website and that your device is recognised there?
Can you confirm that you have tried since the last reinstall when there has been a good WiFi connection enabled to your device? I know you have said that you do not normally use WiFi but I am trying to eliminate issues.
I look forward to your reply.
Hi Dopplerdon
Another thing to try would be to log into the NMS web Control Panel from
the link below -
https://mobilesecurity.norton.com/
Then select Delete next to the device that you have trouble with.
This will remove the device from the NMS Control Panel.
Which will mean you will then have to uninstall NMS from the device and download
again and install, then Sign In and re register and rename the device or use the name
that you previously used.
Then try the Backup feature again of NMS to see if it now works.?
Keep us posted and let us know how you go.:)
Cheers.
I also can not do a back up, live in Queensland,Australia
Okay,
I have now verified the phone exists on my NMS web control panel. Under the "backup" status it states that I need to run a backup. As per instruction, I deleted this account, removed the app from my DroidBionic. Reinstalled the app, created a new phone in the NMS web control panel and get the same identical message as in my original message "service is not available".
This is becoming very frustrating since it worked for over a year and suddenly stopped after a recent upgrade. Backup service works fine on my Samsung tablet.
Hi Dopplerdon,
If you haven't already tried, could you please try connecting the DroidBionic to the WIFI and attempt to run Backup to see if that makes any difference? As for the Samsung tablet, has that been connected to the same 4G network as your phone or through WIFI?
Running NMS in WiFi mode does not change the issue I am currently experiencing on my phone. Just confirmed this again moments ago. The tablet is WiFi only.
All functions available through the web interface work fine, scream, take photo, locate...