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It may be caused that when you take out sim from old phome it has damaged, try for old one is it still working? if not then your sim is dead, also old phones made SIM-s to be bend and such SIM-s have difficlt electrical connection with new phones.
Also find if "this sim only" is activated in your phone.
It must give you signal, Insert sim card, or insert proper sim. If insert sim card warning card is damaged or have not enough good connection, if another, then this sim only is activated you first you must unlock it to work .