If you're looking for higher quality pop ringtones, you might consider the following methods to upgrade your ringtone collection:

1. Purchase from Official Stores: Many artists and record labels release official ringtones that are of higher quality. You can find these on platforms like iTunes Store for iPhones or Google Play Store for Android devices. Purchasing from official sources also supports the artists.

2. Music Streaming Services: Some music streaming services, like Spotify Premium, allow you to download songs for offline listening. You might be able to use downloaded tracks as ringtones. Keep in mind that this may require a subscription.

3. Ringtone Apps: There are apps dedicated to providing high-quality ringtones. Look for apps with positive reviews and a wide selection of pop music options. Some apps also offer features like ringtone editing and creation.