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Android SIM-Free Smartphones

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Android is the most popular mobile phone operating system. Each manufacturer can customise it for their devices, and any developer can create an extension. That's why you'll find a variety of diverse apps on Google Play. Compared to iOS or Windows, however, it puts higher requirements on the hardware and the battery. What are the main differences between the individual Android versions and what are the parameters to consider when choosing a smartphone with this operating system?

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Android version news

Jelly Bean (4.1 - 4.3.1, complete support)

The Google Now assistant allows you to create voice commands, and the drop-down notification bar allows for an immediate response directly from the notification.

KitKat (4.4 - 4.4.4, complete support)

The "Ok Google" command makes it easy for you to search, send SMS, retrieve route information, or play tracks with the help of your voice. The smart dialling function prepares the contacts you call most often to ensure a caller identification and a spam protection.

Lollipop (5.0 - 5.1.1)

It uses a shadow and movement design. With the Android Multiscreen function, you can smoothly switch between your phone, tablet, watch, and Android TV and immediately continue listening to music, using an app, viewing photos, or browsing. The notifications are moved through a locked screen, where they are displayed in order on cards with the option to answer directly from the locked screen. You can also switch user accounts on a mobile phone.

Marshmallow (6.0 - 6.0.1)

The "Now On Tap" function launches the search as soon as you hold your finger on the home button. You can decide what data and features you will share with the applications through the permissions. The new Doze or Standby applications are now available to optimise your battery usage.

Nugget (7.0 - 7.1)

When texting, you can use the updated and new emoji icons (1,500 + 72 new icons) and two languages at the same time. The system can run two apps side by side and combine, for example, a video with a text editor. The Daydream-ready phones have a special Virtual Reality (VR) mode. Other interesting features include enhanced notifications or an advanced security and encryption.

Oreo (8.0 - 8.1)

Android Oreo looks just like a rejuvenated 7 version, however, this operating system is much more sophisticated when it comes to its functionality. The PIP (picture-in-picture) feature lets you watch videos while chatting. An interesting novelty is the notification reminder function or their background colouration. Many other changes are not as visible, but you will definitely welcome them - a half-length device start, an automatic web form filling, and especially the Project Treble, which allows for updates without a dependency on the device manufacturer.

Important parameters to consider when choosing an Android phone

Display size

  • 4-5" - an enjoyable compact size for most users. These devices are easy to handle, while they are also great for watching videos.
  • 5-5.5" - great for watching videos and browsing the Internet, but they are not as compact and you can feel them in your pocket.
  • 5.5-5.9" - these phones are called "phablets". This is a compromise between a phone and a tablet. The size of the display is large enough to be able to conveniently watch videos, browse the Internet and work. However, it can only fit into a large pocket or into a backpack.
  • 6" and more - these phones are specifically designed for productivity. They are great for browsing the Internet, you can enjoy movies and games, but carrying one in your pocket can be an issue. However, you will definitely have a blast multitasking.

Operating memory (RAM)

  • Up to 1.5GB - an unproblematic functionality while playing basic games and using only a few applications at the same time.
  • 2-3GB - can handle challenging games and a large number of running applications simultaneously.
  • 4 GB or more - the phone does not freeze even during the most demanding operations (editing videos and photos). Playing games with the best settings is a sure thing.

Storage size

Most Android phones have an internal memory between 16 and 64GB, but the operating system is part of it. Pure Android reduces the capacity by 4-10GB, graphics and more. A great advantage of these phones is, with a few exceptions, the ability to extend their storage with a memory card, up to 256GB. Dozens of movies, games and apps will be able to fit into this storage.

  • 16GB - can hold several apps and hundreds of music files. This size is only suitable for undemanding users who do not take many pictures or record videos.
  • 64GB - for dozens of apps, games, music albums and several movies. It will be sufficient for most users.
  • 256GB - suitable for the most demanding users who record high-definition videos, store movies, or music and many applications.

Camera

  • Resolution - phones with a 12Mpx sensor resolution can take great images. The good front camera has at least 5Mpx. However, the resolution is not everything. The image quality also depends on the optical quality of the lens.
  • Maximum luminance - determines how much light passes through the optics and falls on the sensor. A F/2.0 and lower luminance are outstanding (the photos will look good even in the dark or during the night).
  • Optical image stabilisation - the phone tries to stabilise the image itself to ensure unblurred images and a more stable video recording. Unlike the software stabilisation, it is implemented by the optics or a sensor shift.
  • Software image stabilisation - works on the principle of increasing the ISO sensitivity. You capture sharper images but it's not as effective as the optical stabilisation.
  • Dual camera - it can accelerate the focus, increase the luminosity, change the focus area after capturing an image, and adjust the field depth. However, the dual camera capabilities and features are different and depend on each specific phone.

Design

  • Metal (aluminium) - a very elegant solution. Typically, these phones belong among the mid-range, upper mid-range and premium range phones (they are usually more expensive).
  • Plastic - the domain of inexpensive phones.
  • Combined - a metal frame with a plastic rear and sometimes a plastic front panel. These are lower and mid-range mobile phones.

Useful features

  • Fingerprint reader - to unlock your phone or access selected applications.
  • USB OTG - allows you to connect a flash drive or an external data drive through a reduction.
  • Notification diode - it flashes when you have unread messages, missed calls, and other unread notifications.
  • Dual SIM - allows you to insert two SIM cards into your phone.
  • A water and dust resistance according to the ingress protection (IP).
  • NFC - a wireless technology suitable, for instance, for mobile phone payments.

 

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Mobile Phone - 5.2" 1920x1080 Super AMOLED, processor Octa Core 1.9 GHz A53, RAM 3GB, internal memory of 32GB, microSDXC up to 128GB, camera 16Mpx F/1.9 + 16Mpx F/1.9, GPS, WiFi, Bluetooth, NFC, 3G/LTE, USB type-C, OTG, fingerprint reader, IP68, 3000mAh battery, fast charging, Android 7.0

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Samsung Galaxy J5 (2017) Gold
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Nubia N2 4+64GB Black/Gold
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HUAWEI P9 Lite (2017) - Blue
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Asus Zenfone 4 Max ZC520KL Deepsea Black
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Xiaomi Redmi Note 4 LTE 64GB Grey
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Samsung Galaxy J3 (2017) - Gold
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Xiaomi Redmi Note 4 LTE 32GB - Gray
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Xiaomi Redmi 4X LTE 32GB Black
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Xiaomi Redmi 4A LTE 16GB Grey
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ALCATEL U3 4049D Volcano Black
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The mobile phone Alcatel U3 features a stylish design and a 4" TFT touchscreen. The device is equipped with a 1.3GHz dual-core processor and 512MB of RAM. The memory of the phone of 4GB can be expanded with a microSD card by up to 12

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Aligator RX460 eXtremo 16GB black/yellow
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Aligator RX460 eXtremo 16GB black
Mobile Phone - 4.5" IPS 960 x 540, Processor MTK 6580 Cortex A7 Quad Core 4 x 1.3GHz, RAM 1GB, internal memory 16GB, MicroSDHC up to 64GB, 8Mpx camera, GPS, Wifi, Bluetooth, waterproof per IP68, 2400mAh battery, Android 7.0

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Aligator RX550 eXtremo black/yellow
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An outdoor, water-resistant smartphone in black from Aligator, a company specialising in devices of this kind. The RX510 complies with...

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Aligator RX550 eXtremo black
Mobile Phone - 4.7" IPS 1280x720, Cortex A53 Quad Core, 2GB RAM, 16GB internal memory, microSDHC up to 64GB, 13Mpx + 5Mp camera, GPS, 3G, microUSB, Dual SIM, IP68 water resistant, 4500mAh battery, Android 6.0

An outdoor waterproof smartphone in black design by Aligator, a specialist in these types of phones. The RX510 meets the IP68 certification...

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Aligator S4080 Duo gold
Mobile Phone - 4.0" 800x480, 1GB RAM, internal memory 8GB, processor MTK 6580 Quad Core, MicroSDXC to 64GB, 5Mpx + 2Mpx camera, GPS, 3G, microUSB, Dual SIM (1x Mini SIM + 1x Micro SIM), battery 1500mAh, Android 6.0

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Aligator S4080 Duo grey
Mobile Phone - 4.0" 800x480, 1GB RAM, 8GB internal memory, MTK 6580 Quad Core, MicroSDXC up to 64 GB, 5Mpx + 2Mpx camera, GPS, 3G, microUSB, Dual SIM (1x Mini SIM + 1x Micro SIM), 1500mAh battery, Android 6.0

The modern Aligator S4080 Duo offers smooth operation and a sleek design at a very affordable price. It supports Dual SIM...

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Aligator S5510 Duo grey
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Aligator S5062 Duo Gray
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ALCATEL U5 HD Premium 5047U Metallic Gold
Mobile Phone - 5.0" IPS 1280x720 display, MTK 6737 Quad-core 1.25GHz processor, 2GB RAM, internal memory 16GB, MicroSDXC up to 128GB, 13Mpx + 8Mpx camera, GPS, 4G/LTE, microUSB, Dual SIM (NanoSIM), fast charging, 2200mAh battery, Android 7.0 Nougat

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Android SIM-Free Smartphones

Android phones have many proven advantages and countless numbers of satisfied users. Google Android is a completely free and very flexible operating system. With a seemingly infinite number of applications, it allows you to customise your phone according to your needs. You will be glad to hear that many applications are free to download.

Which mobile phone brand should you choose?

There are many different smartphone manufacturers and we cannot talk about all of them. Therefore, we will mention the general features of the most popular ones.

Samsung

  • Popular with many users
  • The buttons do not take up space on the screen

Sony

  • Great battery life
  • Many types have an IP68 norm water resistance

LG

  • Frameless design even on the mid-range phones
  • Inexpensive flagships

Xiaomi

  • Interesting performance/price ratio
  • Original MIUI extension with wide customisation capabilities

Huawei

  • Often with a Dual SIM functionality
  • Great features at a reasonable price

Honor

  • Premium mobile phones for a good price
  • Dual SIM functionality even with the most equipped models

Lenovo

  • Plus models with large batteries
  • A wide selection of mid-range models

 

 

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