Yes, it was 1000 . I relinked it through DJI GO4 app. The same procedure as when you got a new bird.
Just returned home after another test. Seems it is working. I flew in a remote area with no wifi signals or radio towers (not sure about influence of those). Started from a hill, flew over forest and fields for 5,8 km and landed with 1/5 signal sticks on the controller.
Only thing I have changed since last flight was to disable wifi, cellular on the phone. Generally it seems that the range varies according to the air humidity, mag interference and other factors. I did my best and cant reach the promised 7 km (not saying about 12 in the US).