An Android Operating System (OS) having 2GB of Randow Access Memory (RAM), 8GB Read Only Memory (ROM), and 16GB (1.40GB reserved) internal storage is less likely to get hanged. The 2GB RAM is more than enough for an Operating System in smart phone.
Here is the top killer methods to boost your smart phone from being getting hanged.
Extend External SD card Storage:
Most users insert 4GB, 8GB, 16GB etc. in their smart phone and transfer or download large files like movies, games, apps, PDF files, photos, documents etc in their internal or external SD card storage and that is more likely for making higher chances to jeopardy the device from getting hanged. Upgrade the storage to 32GB and more if you are running out of space and then transfer large files.
Note: Leave a free memory storage of 1GB minimum.
Install games or Apps that are most important to you like; Whatsapp, Instagram, Facebook, TrueCaller etc. If you are not social then its good to go. Uninstall apps that you no longer use.
Third Party's Apps:
Use phone booster to find large files, games and apps. With ease, you can sneak through and find the hidden large files and apps. Remove them.
The temporary files stored by most apps store cache in your internal RAM memory. Make sure to clean them. Find them under> Settings> Application Management> Apps> Clear Cache.
Note: Do not clear Cookies!
Final, make sure to reserve minimum 1GB of internal storage, extent you SD Card storage and reserve 2GB minimum storage.