What would your response be if a colleague told you, they were going to China for a week on business, and then asked for a loan of your phone.
For me it would fall into 2 camps:
Camp 1: If it was my phone I might suggest, (strenuously), that they seek a phone elsewhere
Camp2: If it was a work phone I would suck my teeth for a bit, take out the “strenuously” and still suggest that they look elsewhere for a phone.
Why the unkind response?
The simple reason for this rather unkind response is that most of us eat sleep and breath our phones. They have become integral to most of our daily activities and they also store a lot of personal data on them. I would probably loan you my car rather than hand over my phone.