Phone emojis on HTC one V doesn't work..


i have an HTC One V ( android 4.0.3 ) and in the official htc keyboard and google keyboard i dont have emojis..
ive been using swiftkey keyboard for almost 2 years ,and 3 months ago they updated it and added emojis but they dosent workon my phone , and also my phone doesnt show the emojis that people put in there tweets in twitter , and the most embarrassing thing is when people send a tweet to me without words only emojis and i cant see it so i dont know what to replay unless i opened the computer and see it , and the official google keyboard in my phone doesnt have emojis because my android is 4.0.3 not 4.4 so what should i do