Phone is lg rebel 4 
Had metro pcs my phone broke. Saved sim and sd card. I saw a cheap simple mobile phone at store which is on t mobile network so got phone and put my metro sim in. Won't work says invalid sim. 
I think i messed up by not activating new phone with the new sim then maybe trying metro sim. Im researching
Has to be someway to activate or unlock to use with my metro sim. And Btw lost the sim card that came with phone so can't just switch and activate PLZ SOMEONE THERE'S GOTTA BE A WAY NEED THIS SIM CARD TO.WORK
Had metro pcs my phone broke. Saved sim and sd card. I saw a cheap simple mobile phone at store which is on t mobile network so got phone and put my metro sim in. Won't work says invalid sim. 
I think i messed up by not activating new phone with the new sim then maybe trying metro sim. Im researching
Has to be someway to activate or unlock to use with my metro sim. And Btw lost the sim card that came with phone so can't just switch and activate PLZ SOMEONE THERE'S GOTTA BE A WAY NEED THIS SIM CARD TO.WORK