Mm....yes. A definite yes. New design, larger screen. New chip. For the LTE/e-sim model (applicable in e-sim countries), better LTE signal reception. Trade-in or sell your S3 and upgrade to S4. If you wait for series 5, your relatively new Series 3 value will sink further. Same with the iPhone X. I plan to trade it in for the XS Max and get relatively high trade-in value (sa Greenhills grey market) to minimize cash outlay.