great for the price two SIM cards work well with the 50 b helium sim1 4g 2g sim2 very convenient to manage personal and professional when you want to call the phone sim sim offers 1 or 2. I really recommend this phone why buy more expensive !!! very good quality sound and images even for very readable screen videos. I put it a micro sd card 32GB now I can give free rein to my desires and install a lot of apps on the SD card