Yes, there seems to be a problem with default sticker set in Viber 5.2. Lot of users allready reported that.
There are still no official explanation what is going on. We hope it will come soon.
With the 2.3 version of Viber, you can send not only text, but stickers, emoticons and locations, also. Stickers and emoticons are a great way to show someone your current fellings or make them laugh. After entering in the conversation, just tap on massage menu (‘+’ sign). The menu in the middle allows you to share your current location and photos. Photos can be added from your gallery or you can take it with your phone camera and send it right away!
If you want to share a Sticker, just slide to the right (left menu). Scroll down and you’ll find stickers. Use them to make a statement! Usefull thing to know is that deleting Stickers is unavailable in Viber for Desktop version for now, but Viber development team is working on enabling this feature. There is also an option to hide certain Sticker Packages on Android devices only. It will be available for iPhones soon.
If you have some brilliant idea for your own Sticker design then all you need to do is send your portfolio and contact information to firstname.lastname@example.org because Viber sometimes offers freelance positions for Sticker designs and perhaps yours Stickers end up as a new hit in Sticker store
If you want to share an Emoticon, slide to the left (right menu). Scroll down and you’ll find pretty cool emoticons! Make your conversations funnier!
Awesome feature, which Viber kept very simple to use, is sending location: if you want to share your current location, just enable it by taping the arrow in the text box. If enabled, your current location will be attached to every outgoing massage.
Another cool feature is sending custom location. For example: if you want to meet your friend or colleague on custom location, use the middle menu button:
Now, to send a custom location, slide the location pin to the place you wish to send and hit ‘Send’.