sagemcom fast 5688w internet going out or losing connection

I have the Sagemcom and am also having way too many internet drops. When mine drops, the app always seems to have the LTE CQI as zero. Doing a reboot either from the app or with the power button almost always restores the connection. The drops happen at all hours of the day or night, so it doesn't seem like a congestion problem. I am using my own router connected by ethernet and have wifi turned off on the sagemcom. Will try doing a factory reset and see if it helps.

I've had issues since the 16th day (December 23rd) of the 15 day trial. Initially the device was doing the constant "powering up" reset for seemingly no reason except it had a device connected attempt to use any bandwidth at all I.E. turning on my Xbox, connecting to wifi via phone. I called corporate tech support (joke) and they suggested exchanging it at my local store and it could be a defect (go figure) did that on the 26th of December. Since that day i have had nothing but strict NAT type issues even after troubleshooting the Xbox and the device (hard reset, choosing ports). I can't seem to figure out if this isn't the product I'm looking for or if I'm missing something because the rep at the local (non franchise store was they called it) said she has the same device and plays the same game on the same console with no issues and we live in the same town.. which seemed like a long shot but we discussed the game in depth and it seemed to check out. Any advice on a remedy or fix to this? I'm open to VPN's of things like that just want to know it'll work before i spend more money. Like everyone else mentioned it works amazing when it works..

Everything describe in this thread is/has happened to me also.

The "tower issues" are a way to bail out of "they don't know what they are doing". On over 75% of my calls that is their go to response.

To make matters even worse I can't get to the metrics of the device (RSRQ, RSRP, and SINR) any longer. They have crippled the 192.168.12.1 and the iphone app.

If you can still get to the metrics, please tell me how you get there.

I started with the Mobile Hotspot, but switched to the Sagemcom Fast 5688W.

Thanks, Fred

I've had the model FAST 5688W gateway for about a month now.  During that time, roughly 6 disconnects that required cycling power on the gateway and then I was good to go again (and it typcially indicates an Excellent connection).  Things now seems to be going downhill fast.  Three days in a row I woke to no connection.  Today, cycling power did not help (I tried multiple times).  After reading this thread, I tried the 10 minute disconnect from power and it did restore the connection for perhaps 30 seconds before I am back to the dimly lit display once again reading 'ATTENTION" and alternating Error Code WAN002 and CEL002.   

I am also VERY DISSAPPOINTED in the inability to tweak the gateway settings for my personal preferences.

David in PDX wrote:

...

The new Sagemcom has been nothing but trouble! It seems to spontaneously reboot itself, and I've been dropped from multiple work conference calls while WFH. A few of the times when I've been dropped, I run upstairs (where the gateway gets a better signal) and see the front screen with the T-Mobile logo and "Powering up..." It doesn't just seem to lose the connection to the tower, but the local WiFi network also disappears. This happens multiple times per day. Sometimes, within 10 mins of me power-cycling the gateway! 😱

...

As far as I can tell, the Sagemcom, while newer, is much LESS reliable than the Nokia I had. 🤦🏻 I’m sorry that I swapped it out, as I the experience has gone from “annoying” to “unusable”. 😣

Similar here.

The Nokia would reboot in the middle of a video chat. Local T-Mobile store offered that the Nokia devices were prone to overheating, bring it in, we'll swap it out. Did that but the Sagemcom 5688 is much worse, exactly as you mentioned. One Android tablet totally chokes with the Sagemcom but was fine on the Nokia.

The T-Mobile Internet app is junk, offering no reasonable configuration tools.

FWIW, the Sagemcom I was handed was a returned/refurbished unit: the "seal tape" was the second seal tape over the box latch, and a green sticker was on top of the box. I was involved in refurbishing returned products, that's how we did it.

Thus, I'd say Sagemcom 5688 is another weak design.

Note… the 2.4 and 5 ghz has nothing to do with your received signal. When my received signal to the gateway is band 12 (700mhz) all is well. However when I'm getting band 2 (1900mhz) reception is lousy. 

The 2.4 and 5 gig is in house use sent to your device by the gateway. 2.4 ghz is good for going through walls, etc when you are far from the gateway. 5ghz is best for when you are in same room as gateway. I use the 5ghz for my tv use and the 2.4 ghz for my other devices. This way Lot are not using the same channel. TV on the 5ghz channel, everything else on the 2.4 channel.

The problem we are all having is due to the received signal that the gateway is using. Band 12 is great for rural use and band 2 is for urban use. Other frequency band work the same. Some for 5G and others for LTE use. 

Having problems? check what band you are receiving and its corresponding freq, is it good for where you live? Probably not.
Glenn

I am lucky because my house is wired.  I turned off the sagemcon wifi and then I connected a good quality wifi router, which is located in the center of my home, to the sagecom modem.  This greatly improved my wifi. I had gone for over a year with few, if any, disconnects, but for the last week I have experienced daily disconnects.  Not sure what the issue is.  I might try a factory reset.

My 5688 is also dropping and reconnecting, I'm on 3rd power off, second reset button, not improving. Signal strength seems identical with better days. Even relocated the 5688, issue seems unimproved.

Can’t help but wonder if the capping of new “Unlimited” plans might be a hint at infrastructure limits which might, in turn, be causing the momentary disconnects to reduce the impact from high volume data consumers.