I have a Lenevo K3 Note purchased in OCT 2015 with latest build no. However, my contact manager takes huge time to respond and often does not respond even. Same with the call log option. kindly suggest. Free ROM is 7GB.Hiii iam using lenovo k3 phone which has some problems facind like hitting phone camera quality touchpad is not good what I shouid do k3 note no backlight available for back key home key and option key