The Galaxy A5x and Galaxy A3x lineup has remained some of Samsung's best mid-range offerings for years. That's no different with the latest models, the Galaxy A57 and the Galaxy A37. Unveiled a couple of weeks back, today is the day that customers in many countries, including the United Kingdom, can finally get their hands on the devices.Generous trade-in values on offer for existing devicesSamsung has made some meaningful upgrades to the new mid-range devices. The Galaxy A57 comes with a more powerful processor, replaces the predecessor's plastic frame with aluminum, and gets design refinements that enable the device to punch above its weight. The devices also boast an improved IP68 rating for dust and water resistance.Samsung has also equipped these devices with enhanced Galaxy AI features. Both the Galaxy A57 and the Galaxy A37 ship with One UI 8.5 out of the box and are guaranteed to receive six major Android OS upgrades.Prices for the Galaxy A57 start at £529 for the 256GB variant. A 512GB variant is also available for £699. Customers can get up to £252 when they trade-in an existing phone. Find the best deals Buy the Galaxy A57 and Galaxy A37 Buy now The Galaxy A37 is also available in two variants. There's one with 128GB of storage and 6GB of RAM for £399. The other has 256GB of storage and 8GB of RAM. It's priced at £459. Trade-ins fetch up to £216.