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Message 3 of 53

BT App - iOS - error MB4-05

Hi, over the last week I’ve not been able to successfully access the BT App on my iPhone (iOS 17.5.1). It’s an app that I use most days to control the wifi across the devices around the house.

When I log in to the app, I get passed email and password, then the app asks me to choose a 4-digit pin (Face ID has worked up until a few days ago) and then I get an error message saying, "Sorry, we haven't been able to log you in. Please try again. (Error: MB4-05)." 

I've tried uninstalling/reinstalling, and I've tried selecting 'Forgotten PIN or different user with no luck. I’ve also tried to access via the BT website but it simply directs me to downloading the myBT app again.

Does anyone have any solutions?



Tags (2)
Message 1 of 53



I am having problems with the MyBT app which I have been using to set times for the kids access to wifi. I got logged out recently and whenever I try to log back in it says success then I get the error message "opps somethign went wrong" 

I have tried many times to delete the app from my phone Samsung Galaxy s10 and reinstall it, I have cleared the cache and the data but it keeps going round in circles saying sucess the crashing. 

Anyone got any idea how to fix tis or is there another app that will allow me to control wifi access like the MyBT app. 



So I logged into the hub with the admin password and the app let me reenter the admin password and worked not a clue why this seemed to solve my problem. 

Tags (1)
Message 2 of 53

My BT App

My BT App not working. This is the only way to control WiFi access on devices & I rely on it for my child’s iPad & iPhone. 

I cannot log in to my BT App. I repeatedly get the following message:
Sorry we haven’t been able to log you in. Error MB4-05. Please try again.
I have:
restarted my iPhone several times
Deleted the BTApp several times
Reinstalled the BTApp several times.

This is causing unnecessary & big problems in my home. My child’s WiFi is paused. 
please help!

Message 4 of 53

Re: BT App - iOS - error MB4-05

Message 5 of 53

Re: BT App - iOS - error MB4-05

I have exactly the same problem. Any luck with a solution? Or any other way to control WiFi to devices? Or complain to BT?

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Message 6 of 53

Re: BT App - iOS - error MB4-05

Not that I know of yet … the kids are on half-term holiday this week and I’m about to get some grief from them as they can’t access internet / gaming until later on in the day!
Message 7 of 53

My BT App - oops something went wrong

No matter how many times I install app, clear cache I get the above error logging in. The my BT app won't let me login. 


I can login on website absolutely fine though.  Google can't find a solution, please advise. 

Message 8 of 53

Re: BT App - iOS - error MB4-05

Same here. Good Luck! Mine have special needs & we rely on internet for calming & emotional regulation strategies. I can’t believe that the App is the only way to control WiFi access and this is our only route for support from BT. Very poor (non existent) customer service.

Message 9 of 53

Re: My BT App

Having exactly the same issues right now!! Just what I need on a bank hol at start of half term!!

can’t find anywhere to get help either??

Message 10 of 53

Re: BT App - iOS - error MB4-05

Exactly the same problem here. 
It’s completely broken today.  Hitting OK on the error message dumps me into the App Store. That’s not helpful at all!