I have an LG smartphone and want to change to a Samsung Galaxy. Both have sim cards. What I want to do is keep my current plan where I basically just pay $10 for 250 texts and the odd voice call. What I want to know is if I just swap the sim card from the LG into the new phone will that enable me to keep my old plan? Basically, just a hardware switch and no bs with locked/unlocked phones etc (I am not sure what locked/unlocked means). I just want to keep my current plan but upgrade my phone.