My granddaughter is on my daughters shared plan. Her cheap phone broke. I have a Nokia Lumina 520 that is available. If I put the sim card from the broken phone into the Nokia will there be any issue? She only pays $10 for this second phone, but she only uses it for texting.
The Lumia 520 is a smartphone, so she will be required to have a data plan. If you put her SIM card in the phone, AT&T will likely detect that she's using a smartphone and will automatically add the 3GB data plan to her line.