Which is the faster sending speed, the SMS group sending setting on the mobile phone or the SMS group sending setting on the sim card?

I think it's the phone itself. Hurry up! ! Because you use the SIM option to send a message, it is slow to enter it first, and the SIM card is also a bit slow to find the contacts on the phone in turn. Then, if the mobile phone has a group sending setting, sending messages directly is faster than adding SIM one by one, but the most important thing is to see what mobile phone you are using. I think the fastest mobile phone to send messages is the old Nokia mobile phone. Now the intelligence is not very fast, but SP's is fast! !