There are several ways to find used mobile phones in Pakistan.

Here are some options:

1. Online Marketplaces: There are several online marketplaces where you can buy and sell used mobile phones in Pakistan. Some of the popular platforms include OLX, Daraz.pk, and PakWheels and most popular Plateform is MobileFinder.pk

2. Social Media: You can also search for used mobile phones on social media platforms such as Facebook, Twitter, and Instagram. There are several buy and sell groups on these platforms where people post ads for used mobile phones.

3. Local Shops: Another option is to check out local mobile phone shops in your area  Create online mobile and accessory shop online.Many of these shops sell both new and used phones, and you may be able to find a good deal on a used phone.

4. Word of Mouth: You can also ask friends, family, and colleagues if they know of anyone selling a used mobile phone. This is a good option if you are looking for a phone from someone you trust.

When buying a used mobile phone, it is important to be cautious and do your research. Make sure to check the phone's condition, including the screen, battery, and camera. Ask the seller about the phone's history, including whether it has been repaired or refurbished. Also, make sure to check the phone's IMEI number to ensure it is not blacklisted or reported as stolen.