iPads not backing up to cloud or updating

@user_e26731 Hello, thanks for the post! Since you have one our xFi modems, I would suggest opening up the Xfinity app to check on those specific devices to make sure there aren't any firewall or other settings on that would stop them from working fully. This is great resource when it comes to xFi network settings: https://www.xfinity.com/support/articles/xfi-advanced-settings. Please let us know if that helps at all. 

In the same situation. Multiple iPhones and iPads that stopped back up to icloud the end of June.  Something changed on your end.  If I leave and go to a different wifi network that is not Xfinity they back up fine.  What is going on Xfinity?

I’m also having the same difficulty.  All iPhones and iPads will not backup or update while on my  Xfinity network because it says there’s not a strong enough connection.  However, it works just fine on cellular or any non-Xfinity network.  In doing some searching online this seems to be an issue that’s happening to many people with the affinity modem.  It seems like something Xfinity should be looking into fixing ASAP.

Add me to this list, with a few exceptions.  When this all started, I had the same modem I’ve had for a while.  I am connected to WiFi and can do all internet things, but constantly have the error message that I need to connect to WiFi.  We’ve had 2 new modems, 2 tech visits and still the issue persists

it also affects my firestick, when I turn it on it says newtork not available, but I just have to click off the WiFi and back on and it comes back.  

ghe error message I get on my iPads is attached.

I tried to turn off advanced security and it did nothing. I worked with senior advisors in Apple and my case was reviewed by Apple engineers. It is Xfinity issue. I have two iPads which stopped backing up to iCloud. I tried to restore old backup to one of them and is did not restore either. The message is the same: poor network connection. The backup works on other networks, ie library. I turned off advanced security at home and it did not help. One line help is useless, I spent hours with them, but they have no help. I am looking for another internet provider.

Glad I found this thread.

Since switching from my own modem to the Xfinity modem last month, the following devices have issues:

1) Both of our iPhones no longer backup to iCloud - "the last backup cannot be completed because of poor network conditions". They backup fine when I go someplace else and use another wifi network.

2) Photos on my Mac no longer syncs with iCloud.  I spent a lot of time with Apple support and its not on their end.

3) Printer will no longer connect to our network.

4) Kindle will no longer connect to our network.

Just had the Xfinity tech come out this afternoon again and he saws there is nothing wrong with the network.  I have to disagree.  Three different devices no longer connect since switching to the new modem.

Spending a lot of money each month now for something that only partially works.

I would like to get this resolved, but if I can't, then I will be looking for another service provider as well.

Update to my previous post:  Last night I connected my Mac to ethernet and Photos synced immediately.  Definitely a Xfinity wifi issue.

Same issue with my iPad Pro and iPad2. Since end of June, neither device can perform an iCloud backup. Used to run these iCloud backups every week and now simply get failed attempts with the “…poor network conditions” error message.

Members on the Apple Community website believe there is some form of incompatibility with the iPads’ iOS and Xfinity modem IPv4 and IPv6! Either way, the problem did not exist until Xfinity “upgrades” at the end of June!

Has anyone got this resolved? I have the same issue with my iPad. Can’t backup.  Can’t download updates. 

No help from Xfinity. They replaced my Gateway and it changed nothing. Backup works on other networks. Xfinity has no adequate support or interest to solve this problem, no advanced support whatsoever.

For WiFi radio incompatibility issues, a really simple fix?  Next time you're walking down the isle in a big box retail place or home improvement store, look for a dusty discontinued 802.11 N300 b/g/n access point.  Sometimes you can find one for $30 or less.  Maybe you got an old WiFi router on a shelf.  A lot of them have an access point mode.  2.4G signal (802.11 b) is not sporty.  Transfer rate is pretty slow, but it goes through walls, does distances well, and the connection is usually remarkably solid.  Old gear and old radio chipsets?  They just work better than cost reduced stuff.  Throw hardware at the problem.

If the problem is your internet connection itself is struggling due to signal issues, and you are dropping and rebonding channels frequently and hitting uncorrectable errors, and breaking that active state connection to the backup servers, that's a different issue.  To get the backup to work you need a solid stable connection, and it has to stay solid for a long time while it's going on.  If that is the issue, then you would start here:  https://forums.xfinity.com/conversations/your-home-network/internet-troubleshooting-tips/602dae4ac5375f08cde52ea0 

It is xfinity security problem. Network functions well with strong signal. Also I can login on any weak network and backup without any problems. I navigate without problems and the speed is 300-400 ghz. The xfinity does not recognize its own network when it comes to backup or restore. I guess I can just connect to Ethernet directly to bypass network, but it’s a pain. They just don’t give a damn.

So I found a great thread on Apple forums. The resolution that has worked for people is to downgrade the xfinity modem/router to the XB7.  (XB8 is their newest which most people have). Everyone in that thread with the iPad backup & IOS update problem said that after downgrading to the XB7 it fixed the problem.  They say there should not be any wifi performance difference with the XB7.  I ordered mine and the real person chat agent at xfinity is also giving me a full month credit on my internet so don’t be afraid to ask for that too.  It is likely that since June firmware updates to the XB8 were pushed over several weeks and broke connections to iCloud services. 

I'm in the same boat with iPhones and iPads not updating or backing up.

Works over cellular, works on non-Xfinity networks, but not at home over Xfinity. Seriously considering canceling the service.

Same here, iPad and iPhone can’t perform iCloud backup on Xfinity Wi-Fi. Brand new service. All other Wi-Fi networks can backup work fine, as does cell. Definitely an Xfinity modem issue. Finally backed up phone by turning off Wi-Fi and using cell data, but iPad can’t backup.