Yes, the sentence "What’s the name of your first mobile phone? Do you still remember?" is grammatically correct.
**Meaning:** The speaker is asking someone to recall the name or model of their first mobile phone and whether they still have a memory of it.
**Possible rephrasing:**
1. "What was the name of your first mobile phone? Do you remember it?"
2. "Can you tell me the name of your first mobile phone? Do you still have any memories of


