I have been uesing this type of mobile yet one month ago. now I avoid samsung galaxy ace because storagecapacity is very law. I cant instal more apps in this type of mobile and still my mobile working contions. the reliability and durability is good. galaxy ace dont have a front camera so I cant take a selfi. samsung galaxy ace s5830 RAM is very low only 278 mb ram that is the main problem. the disply size is only 3.5inches. the main problem of this type of mobile is not working high defenition vedios so I avoid this phone.