It's likely that with a dual-SIM physical phone (that is, with 2 x physical SIMs) - the phone will use more processing power managing both SIMs compared to one, which may appear as slow down, particularly if the processor used in the phone is older. ...
Just as a follow up to the question - as this was the first post I came across - if I'm, say, visiting the USA and want to be able to receive calls only but NOT to be able to use data (as it's very expensive), can I just buy an 'out of plan' add-on b...
