Yes, microUSB v2.0 (MHL 2), USB On-the-go, USB Host
Yes, microUSB v2.0
Yes, with A-GPS support and GLONASS
Yes, with A-GPS support
HTML5, Adobe Flash
User Memory Samsung I9502 Galaxy S4 Duos and Karbonn A25 internal and external memory, storage comparison.
16/32/64 GB storage, 2 GB RAM
512 MB ROM, 512 MB RAM
microSD, up to 64 GB
microSD, up to 32 GB
Sensors Check whether Samsung I9502 Galaxy S4 Duos and Karbonn A25 has fingerprint, NFC, proximity sensor, light sensor, accelerometer sensor, magnetic field sensor, gyroscope, barometer sensor or heart-rate sensor?
Battery Samsung I9502 Galaxy S4 Duos or Karbonn A25, which has the higher battery capacity and talk time?