Clone a mobile phone sim card?

I recently started a social media detox, where I ditched my smartphone for a 10-year-old Nokia 6230.

I like the simplicity of using the nokia and I plan to continue using it as my #1 phone but there are times where I would like to use my smartphone for urgent emails, using certain apps etc.

I'd like to have the ability to run both phones in parallel, without the hassle of swapping the sim card every time I want to swop phones.

Does anyone here know if it's possible to clone a sim card?

Legality, practicality etc?

This may sound daft Kevin,
How about having the smart phone in ultra power saver (Samsung do it) where you have the smart phone that is basically acting like the the nokia and battery that will last maybe 4 to 5 days bacause all is turned off, you can select 3 or 4 things to work, like text, phone etc

I remember asking the question years back about sim copy but it wasnt possible that time,

Spot on.

If you only need the smartphone for emails/apps, you don't need the same phone number on it?
Use a cheap SIM from GoMo or similar (with a different number) just for data connection for the smartphone.
I don't think it's possible to have two SIMs with the same phone number (cloning usually means the original is replaced).

But my niece lets me keep both Sims on **** network

And there was us lot thinking Liam was an honest lad

Only joking Liam well spotted

It's always the quiet ones.........