I read somewhere, these phones are locked only within the US and if we use it outside the US, it would be Ok (restriction free) so I can use a Telstra, Optus or Vodafone sim card...not sure if it's true though.
I know this is true for a fact with the D3. If you get a D3 and get the sim unlock code for it, you can use any sim card anywhere except the US. All global phone like the D3 can do this.
Also, if we put ICS to Droid 3, it will probably use even more RAM. Most of the RAM is probably taken by Motoblur and the Verizon bloatware (especially) anyway.... If we put a custom ROM, that would make things better.
The thing about putting ICS is that fact that you can freeze bloatware without rooting. You can freeze any app no matter what so if RAM is an issue for you you can just freeze it and it won't use any RAM or run int the background until you open it again. So ICS won't be a problem.
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