Sound reception was not good in asus zenfone 5. I m using it from 2 yrs. I know what problems persist with this smartphone. I also like tell that after few months of buying this product will show their real face. For 5 inch display they should provide us quad core processer but they only offer dual core which disappoint us. Display of asus zenfone 5 looks medicore with poor pixel density. Battery backup is also average it drains so quickly. Also in zenfone some connectivity features are missing like NFS and 4G. As always every smartphone device has the overheating and asus zenfone 5 is not behind. Yes it also overheats too. The device while calling is not good and we have confirmed it. You need to concentrate to hear it properly while normal calls are going on. On the other hand the charging time of asus zenfone 5 takes much time compare to usual.