Deterioration of mobile broadband service

[CodeGlitch]

Hi all.

So I've been a happy user of a mobile broadband (data-only) SIM.  Using the coverage checker for my postcode I should be getting 4G indoor/outdoor.  The MiFi device reports the connection as DC-HSPA+ with a low signal stength, but does give me 10Mb/s+ download speeds (as reported by fast.com).  Ping times would be around 70ms.

However, over the last few weeks the connection has been unusable.  Speeds are as low as 1.5Mb/s and the connection will drop every 10 seconds or so.  I can't even browse the web

I changed MiFi devices (to a 4G dongle, then a 4G enabled Android phone) - all suffer from the same problem, so I know it's not my hardware.

Would changing the SIM help? 

If the service doesn't improve - do I have a chance to cancel my contract (I'm still within the 12months), as I'm not recieving the service I'm paying for.

ps. It's a 50GB SIM contract, and I'm nowhere near the limit of 50GB.

Thanks for any help

James

[Jenny]

@CodeGlitch - Please try the steps in our network troubleshooting thread.

If you're still experiencing the issue after completing these steps, post the template with your answers here and we'll get back to you ASAP.