From: Steve on
I'm on the older SIM Only T-mobile tariff (50 minutes cross net for
£7.50). I was pleasantly surprised to see I could add a flexible booster
to my account and added the unlimited landline one which became active
today.

After about an hour of calls to a landline I checked online. It hasn't
charged but says there is no monthly allowance left!

Surely it can't use up the 50 minutes on landline calls before the
booster?

Steve.