Answer: The Wallace family had been living there for the past three years, and she was making some really excellent friends
Step-by-step explanation:
The quotation from the passage that best supports the inference that Jasmin is using her phone to socialize is that "The Wallace family had been living there for the past three years, and she was making some really excellent friends".
Even when Wallaces’ furniture and belongings were being packed, she didn't didn’t help much but was rather busy with her phone. This illustrated the point that she was socializing and making friends through her phone.