Upgrade what you study with.

Yes — hostel and PG addresses work. Bring your student ID, and if the building has entry rules the agent coordinates with your warden or manager. The visit is free and there's no charge until you accept a value.

No minimum. Trade what you have toward whatever fits your budget; your old device's value comes off the price and you pay only the difference. You can cancel any time before payment.

That's fine — the visit is free and nothing is charged until you accept the value. If you don't accept, no money changes hands and you keep your device.