Easy fix for Google Nexus 4 sliding off surfaces and muffled speaker
World's smallest IKEA hack
The Nexus 4 may have been superseded, but anyone still using it probably still struggles with its (great looking) slippery flat back, which makes it slide off most slightly slanted surfaces and also muffling the speaker when placed on its back. Easy fix for that: get a rubber bumper pad - eg. from IKEA - and stick it to the back next to the speaker. The rubber stops it from sliding, and since it's lifted up slightly, it lets more sound from the speaker out (demuffling!). I carry my phone in my pocket and the pad has stayed on for several weeks so it's fairly durable too. Good luck!