using plusnet sim in a 3g/4g usb dongle

[#1]

I have a Vodafone K4201 HSPA+ USB dongle (which is basically a badged Huawei). I would like to use the PlusNet sim instead of the Vodafone one. I have the Plusnet sim installed and have changed the dongle's access point settings to EE. The dongle lights up but there doesn't appear to be a data connection. Do I need to do anyuthing else? The 3G dongle works fine with a Vodafone sim and the Plusnet sim works in an Android mobile phone (with data).

[#2]

I wonder if it's a similar problem to that with tethering on some phones? I guess the dongle acts in a tethering mode. On phones with the problem it can sometimes be fixed by adding DUN to the APN options.

Try googling 'tether dun required'

[#3]

Checking on the vodafone forum, it could be the dongle is still locked to the vodafone network (even though it is fairly old).  Have requested an unlock code from vodafone just to make sure.

[#4]

Very likely, most dongles tend to be supplied licked

[#5]

You can use a router manufactured by Netgear which are as affordable as Vodafone dongles. You can visit https://netgears.support/netgear-technical-support/

[#6]

I ended up getting an EE 4G wifi device from the Currys sale for £5. EE have some reasonable PAYG data only SIM packages. Way cheaper than VF.