Was there some reason why you didn't ask immigration about the 65k/month
method which you say was acceptable at your previous immigration office.
If not, maybe you should go back and ask and save yourself all the worry
With all due respect why when you seem to have little idea of the basics of how your phone, SIM and the network interact do you want to confuse matters.even more by introducing a second SIM.
Hi
I'm not sure if you are aware but you do not require a physical card reader for Pin Sentry use'
If you have a mobile phone, your debit card and associated PIN you can load Barclays
Mobile Banking App on your phone and use Mobile Pin Sentry