You shouldn't keep trusting those crazy PhoneArena reviews. Most of the time they are clear **bleep**.
I've already talked with Nokia Care thrice and they stressed on the point that 305 uses a 'Basic Mobile Processor' which is NOT clocked to 1ghz. There's no point hiding the use of 1ghz or any other good clock rate if ever it was there.
Aha 305 just uses the Basic processor as other/older s40 devices use. I'm sure its not even 800mhz
Thanks for moving away from your initial reply of 1000mhz
2013-01-05 18:37 - edited 2013-01-05 18:45
The first Series 40 devices which had their CPU clock rate officially listed were the Asha 300 and 303; both have a 1 GHz processor. At the same time Nokia "stealth" launched new versions of the C3-01 and X3-02, also with 1 GHz processors (strangely with no marketing or promotion of the improved models, probably in order to avoid "osborning" the older models). At the same time it was revealed that the original C3-01 and X3-02 had 680 MHz processors (that is also official from developer specs).
So, putting two and two together one might speculate that the Asha 305, 306, 308 & 309 perhaps use the older generation HW with a 680 MHz processor. On the other hand it could be that they use something altogether different still. The fact that Nokia does not disclose that information points to the latter option in my opinion, because 680 MHz would be similar to entry-level Android smartphones such as the Galaxy Y and therefore not too bad, but then again the 680 MHz processors of the original C3-01 & X3-02 were originally not revealed, either, so who knows (other than Nokia employees such as Armagon with access to the specs, obviously).
Oh, and the reason why the Asha touch other than 311 do not have a 1 GHz processors, whereas something like the Asha 300 does have it is pretty simple: they have 3" WQVGA display with multi-touch (and capacitative in case of the 308 & 309), which is more expensive than the 2.4" QVGA resistive single touch screen on the Asha 300, so Nokia had to save from something.
2013-01-06 3:37 - edited 2013-01-06 3:40
I know the topic quite well as in the past I used to manage the developer.nokia.com device specs pages for a few years..
we would have wanted to publish the CPU details for all products as understanding the performance differences between products is important especially for app developers, but never got a permission from the Mobile Phones management to officially publish those details for all Series 40 devices. The 1 GHz ones (and yes, X3-02 and C3-01, to explain the differences between the different HW variants for the product) are the only exceptions as with those devices the fast CPU was seen as a benefial selling point.