topic Re: Smart Hub 2 with Enhanced 4G Hybrid loosing the 4G speed after 2 weeks or on Hot days. in Broadband

Smart Hub 2 with Enhanced 4G Hybrid loosing the 4G speed after 2 weeks or on Hot days.

JohnP3 — Fri, 18 Sep 2026 17:23:29 GMT

Hi,

At our remote workshop site we have a SH2 running ADSL on 2 miles of 60yr old phone cable, we are waiting for FTTC to become available.
When our customer gift shop is open (once a week) the 5-6mbps download and 0.5 mbps upload is enough for their card machine. However we have CCTV and a security system that requires an upload speed of >5mbps on demand, so we have enhanced EE 4G hybrid. So when our security system wants live CCTV then there is the upload speed for this.
The recent hot weather has played havoc with our speeds and in cooler weather I have periodic drop out of the enhanced 4G hybrid.

Lets answer the most obvious questions I have been asked.

The router is located in a data cabinet out of direct sun light.
The 4G hybrid box with it's external aerials is on a shelf close to a perspex window and not in direct sun light.
They are located in a conveted stone barn/workshop at the gable end in a 1st floor rest/mess room.
The 4G hybrid box always has 2 bars of 4G signal strength on its display (with a blue status).

From other support forums I have discovered that the SH2 periodically (every 14 days) does a 45 min power cycle. I have the following questions:

If put a mains timer on the router and 4G hybrid that take them both down at perhaps 6am for 30 mins would this solve my 4G outage problem?
Is this power cycle event controlled by BT or is it built in to the SH2's firmware?
If this is BT controlled event do we know at what time & day of the week it normally occurs on?
Is it the SH2 instructing the 4G hybrid to establish the 4G link with a local 4G mast on boot up or is it the 4G hybrid that establishes the link to the 4G mast then tells the SH2?
How long does the 4G hybrid try to maitain a 4G link for before it times out when the router is going through its power cycle?

I'm sorry that some of these are quite tricky and need someone from the BT's level 2 support to answer them.

JohnP

Re: Smart Hub 2 with Enhanced 4G Hybrid loosing the 4G speed after 2 weeks or on Hot days.

BethM — Mon, 21 Sep 2026 15:45:18 GMT

Hi JohnP3

I have consulted with our technical support team regarding this and have been advised that the automatic power cycle should only take a few minutes and take place in the early hours of the morning, same as when there is a firmware update pushed out. Is there any pattern to when you are seeing these prolonged outages?

Re: Smart Hub 2 with Enhanced 4G Hybrid loosing the 4G speed after 2 weeks or on Hot days.

JohnP3 — Wed, 30 Sep 2026 15:20:10 GMT

Hi Beth

I see SAAF reboots reoccurring between 22:00- 05:00 have typical invervals of 14-16 or 35-40 days.
We had a lot during the heat wave. I assume that SAAF reboots are automatic and are associated with BT firmware updates or other management.

Is there a published list when these will occur. If I'm prewarned then I can schedule people to do 9 am reboots.

Another 2 quick question is there a way of remotely testing that the 4G hybrid is still talking to the router and supplying the speed boost?

I'm thinking of putting a remote access server on the network that will allow me to remotely login and perform a daily speedtest. If I do this, is there a way of giving reboot commands to the 4G hybrid and the router?

Re: Smart Hub 2 with Enhanced 4G Hybrid loosing the 4G speed after 2 weeks or on Hot days.

BethM — Thu, 15 Oct 2026 09:20:47 GMT

Hi JohnP3

Most of the SAAF reboots are triggered only when hub uptime > 14 days. So if the hub gets rebooted due to any other reason within the interval, this reboot will get deferred for at least another 14 days. The Hub GUI page has the system uptime information which can be accessed from any LAN device remotely. Please do keep in mind that there will still be other rare reboot instances for reasons such as firmware upgrades.

With respect to validation of the hybrid talking to the router, the Hub admin GUI page has the Hybrid connect tile which has the 4G connection status. If you click on the tile, more information is available regarding the connection details.

As to the question of rebooting remotely, the GUI page has the option to trigger reboot on the hub. There is no option available to reboot the Hybrid remotely.