Samsung I9190 Galaxy S4 mini

Released 2013, July
107g, 8.9mm thickness
Android 4.2.2, up to 4.4.2
8GB storage, microSD card slot
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4.3"
540x960 pixels
8MP
1080p
1.5GB RAM
Snapdragon 400
1900mAh
Li-Ion

Also known as Samsung I9190 Galaxy S IV mini; Samsung I9190 Galaxy S4 mini Duos with dual-SIM card slots

Launch	Announced	2013, May. Released 2013, July
Launch	Status	Discontinued

Body	Dimensions	124.6 x 61.3 x 8.9 mm (4.91 x 2.41 x 0.35 in)
	Weight	107 g (3.77 oz)
	Build	Plastic body
	SIM	Single SIM (Micro-SIM) or Dual SIM (Micro-SIM, dual stand-by)

Display	Type	Super AMOLED capacitive touchscreen, 16M colors
	Size	4.3 inches, 51.0 cm² (~66.7% screen-to-body ratio)
	Resolution	540 x 960 pixels, 16:9 ratio (~256 ppi density)
	Multitouch	Yes
	Protection	Corning Gorilla Glass 2

Platform	OS	Android 4.2.2 (Jelly Bean), upgradable to 4.4.2 (KitKat)
	Chipset	Qualcomm MSM8930AB Snapdragon 400
	CPU	Dual-core 1.7 GHz Krait 300
	GPU	Adreno 305

Memory	Card slot	microSD, up to 64 GB (dedicated slot)
	Internal	8 GB, 1.5 GB RAM

Camera	Primary	8 MP, f/2.6, AF, LED flash, check quality
	Features	Geo-tagging, touch focus, face detection, HDR, panorama
	Video	1080p@30fps, check quality
	Secondary	1.9 MP

Sound	Alert types	Vibration; MP3, WAV ringtones
	Loudspeaker	Yes
	3.5mm jack	Yes
		- Active noise cancellation with dedicated mic

Comms	WLAN	Wi-Fi 802.11 a/b/g/n, dual-band, WiFi Direct, DLNA, hotspot
	Bluetooth	4.0, A2DP, EDR, LE, aptX
	GPS	Yes, with A-GPS, GLONASS
	NFC	Yes (GT-I9195, SGH-I257M)
	Infrared port	Yes
	Radio	Stereo FM radio, RDS/ I257M model with no FM radio
	USB	microUSB 2.0

Features	Sensors	Accelerometer, gyro, proximity, compass
	Messaging	SMS(threaded view), MMS, Email, Push Email, IM
	Browser	HTML5
		- MP4/DivX/XviD/WMV/H.264 player - MP3/WAV/eAAC+/AC3/FLAC player - Photo/video editor - Document viewer

Misc	Colors	White Frost, Black Mist, Blue, Pink, Orange, Purple, Black Edition
	SAR	0.89 W/kg (head) 1.38 W/kg (body)
	SAR EU	0.33 W/kg (head) 0.32 W/kg (body)
	Price	About 230 EUR

Tests	Display	Contrast ratio: Infinite (nominal), 3.127 (sunlight)
	Camera	Photo / Video
	Loudspeaker	Voice 66dB / Noise 64dB / Ring 75dB
	Audio quality	Noise -93.5dB / Crosstalk -86.2dB
	Battery life	Endurance rating 54h

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Samsung I9190 Galaxy S4 mini - user opinions and reviews

I think he talks about increasing SWAP memory,swappiness,entropy

I am not sure you can upgrade RAM by installing MicroSD card. But you can free some of the internal memory by using memory card

Its fine