GSM/UMTS

           Only in America are CDMA devices very popular which says a lot as CDMA is constantly ageing. GSM devices have ruled over seas and in domestic areas the best thing about GSM is you can put in a SIM card and continue using your service. However doing that can cause certain features such as HSPA or LTE to not work and as a result the device can be useful or useless.

          GSM based devices use HSPA,UMTS,EDGE,GPRS or LTE the huge advantage that GSM has over CDMA is the universal ability to change service providers however some carriers may choose to "lock" their devices to keep it on their network however you can "unlock" by entering an unlock code. Airwaves provide the way for wireless devices to communicate and different frequencies like 850MHZ can talk to 1900MHZ. With that being said you will want to check your device's frequencies and the carrier you want to switch to frequencies as having all frequencies but one can result in having only EDGE. That is the thing that people don't seem to give Apple credit for as the iPad and iPhone have LTE and GSM and CDMA radios and don't disappoint on performance unless it is a bad radio or network if you have Sprint. I personally recommend a world phone that can be unlocked for another network like O2 so if you come to the U.K for example your AT&T phone will use O2 and vise versa. Another thing people don't seem to credit Apple for making a dual CDMA and GSM radio so if you have Verizon or Sprint or any other CDMA carrier you can use a GSM carrier for back up or just left Sprint.

All mobile phones are different

  With Qualcomm and Imagination Technologies and NVidia releasing new GPUs for mobile phone and tablets which GPU files is good. The mobile phone has made huge improvements like Android 4.1 bringing Tripple Buffering for the UI to the point were now it feels as technology advances too fast and the one of the worst things are with a mobile phone is that we can't upgrade hardware like in PCs. This time I will be showing which mobile will be best and what phone to look for.
   
    Ok so you maybe a little angry that you may have bought an HTC EVO 4G and it can't game so here is why it can't game it has an old and fairly low end Adreno 200 GPU and with the EVO's high resoulution (480*800) that does not make a great pair but with a 1GHZ snapdragon CPU it may seem quick using Android. Now let's take a phone like the Samsung i9000 it has a quick and once undefeated PowerVRSGX540 GPU which if it has been lag fixed it can play any game in the market when it was released.

    Now into dual core handsets like the Samsung I9100 which has Samsung's own Exynos processor and it is still today very fast and over clocked @ 1.5GHZ will be close tot beating the US Galaxy SIII. The Galaxy S2 the Exynos variants have Mali-200MP which is in the International Galaxy SIII but is over clocked but another difference with the handset is it has a full 1GB of RAM but has the same resolution has the previous Galaxy phone. Now into the LG optimus 2X which has the Nvidia Tegra 2 CPU but one thing that bugs me is that lots of people don't know how fast Tegra chips are, but they are not benchmark setters in tablets with high resolutions. The Optimus 2X has an ULP GeForce GPU and has 8  GPU cores so it is certainly no slouch. Now that the Galaxy Nexus is out it has the same GPU in the Galaxy S phones but it much faster since it is over clocked. But the Ti-OMAP processors aren't in any way benchmark killers but are not slow.

   Now into the Samsung Galaxy SIII international which has Ssmung's own Quad core Exynos processor and over clocked Mali-400MP GPU and however only has 1GB of RAM opposed to having 2GB in the US galaxy phone. However the ONE X having a super fast CPU and probably the Adreno 225 GPU. Now the last device the Nexus 7 having a Quad core CPU and a 8 core GPU ULP GeForce so comment but no spamming.