I have both the Nokia DT-900 that i had used with a previous phone, I also bought the Samsung Wireless Fast Charger. The Galaxy S7 charges no problem with the Nokia charger, But i have noticed that using the Nokia brand charger my S7 gets much warmer while charging. Using the Samsung wireless fast charger my phone stays a lot cooler. I think this is because it has a built in fan that only activates during fast charging.