Hello friends, Today I will tell you about best smartphone under Rs.20000 is Samasung galaxy j7 prime.I use this phone for last 6 months and I satisfied.If you want to buy a 4g smartphone than I suggest you to buy galaxy j7 prime mobile.It has 3gb ram and 5.5 inches TFT display.it also has 13 mp rear auto focus and 8 mp front camera.It is a best smartphone lauched by Samsung company.It is one of the best smartphone.