Hii jorgejacs12 and ChiWen
hey i too have samsung galaxy Attain 4g n i just love it. the only problem i faced was my battery used to die real soon and i had to charge it almost 2-3 times a day. i bought battery from ebay n trust me the Mah which they mention was totally fake. i bought a bttery from Ontrion tried n tested n i just charge my phone for 2-3 hours and i m done for almost 2 days. you can visit the link
Samsung Attain R920 Extended Battery
believe me you will thank me for this.