Normaali väittää että Iphone 4 antennivika on mystisesti nanotekniikalla mennyt 3G ja 3Gs malleihin. On se apple taitava!
Ja normaali väittää että ei ole yhteysongelmat hävinneet porukalla kun ovat päivittäneet ja signaali boostataa että yhteys pysyy ylhäällä.
Mitä jos lopetat paskan puhumisen?
“This change actually presented itself in our numeric signal strength reports – there’s more dynamic range in these numbers too. Previously, the absolute lowest value any iPhone would report was -113 dBm. With iOS 4.0.1/4.1, the value is now a shockingly low -121 dBm. In the iPhone 4 review, I talked a lot about how although the phone is prone to dropping signal from being held wrong, it was measurably more sensitive in weak signal areas. I was shocked that calls and data worked seemingly unfazed at -113 dBm. It seems as though this increased 8 dBm of range below -113 dBm was meant to show really how much more sensitive the radio stack is – it undeniably is more sensitive. Both Anand and I were able to hang onto calls all the way down at -121 dBm.”
“Reception in average conditions is sometimes significantly better on the iPhone 4 than on the 3GS. Take a look at the image capture below. In the same exact location we have better reception on the 4 than the 3GS. Granted this could be due to a number of variables outside of the phone’s antenna itself, but it happened enough times that it’s worth reporting. This is the positive to Apple’s external antenna design – you can and do get better reception. Unfortunately the tradeoff is the scenario I just described before this.”
“iPhone 4 (left) at -103 dBm vs. iPhone 3GS (right) at -104 dBm”
“iPhone 4 being held tightly (left) at -115 dBm vs. iPhone 3GS being held tightly (right) at -107 dBm”
“The iPhone 4 is better at holding onto calls and data at very low signal levels. We’ve mentioned this one before but it’s worth reiterating. The new antenna does let me make calls and transmit data at very low signal strength. With the iOS 4.0.1 update I was able to make a call at -115dB on the 3GS, however the call did drop within a minute of starting it. By comparison I was able to have a much longer conversation without dropping the call at -120dB on the 4. By no means is this a scientific comparison, but anecdotally both Brian and I feel that the low signal strength performance of the iPhone 4 is better than the 3GS.”
“I can’t stress enough that this issue impacts all users. The variability is in how strong of a signal you have to begin with. That’s the absolute only reason there’s debate in these discussions from phone to phone. At my desk I don’t get great reception on AT&T. With the iPhone 4 I’m usually at -96dBm. If I keep a tight grip on the phone or if I’m holding it to send text messages I can sometimes lose all signal entirely. This is a combination of poor reception at my house and the fact that the 4 loses more of its signal than other phones when held certain ways.”
“Brian on the other hand has much better reception at his home. To him, the signal strength drops but it does not drop enough for this to be a problem. I consider myself to be on the border. If I’m mindful of how I’m holding the phone it’s not an issue, and even most of the time if I’m not paying attention to it it’s not an issue.”
“Instead of a 24.6 dB drop from cupping the phone tightly without a case, with bare skin, we see a 16.6 dB drop with tape all the way around, and a 14.7 dB drop wearing a rubber glove. Insulating the stainless steel completely from the hand completely results in 9 dB less of signal drop. The remaining 16 dB is then due to the hand being so close to the phone.”
“The takeaway is that the best coatings Apple could possibly apply would bring the drop down to 15 or 16 dB – in league with the Nexus One’s worst case drop, and almost in league with the iPhone 3GS worst case drop. It’s hard to argue that bringing the signal drop down to levels other phones have been selling with for a year now isn’t a problem solved type solution.”
“However, adding tape won’t completely eliminate the drop in received signal, nor does it mitigate the problem nearly as much as getting a case. In fact, if you’re really concerned about dropping signal on any phone, you should get a case anyways. It demonstrably reduces the signal attenuation added by having your hand so close to the radiative surface of the antenna.”
“The phone itself delivers better battery life than anything else in its class, has good performance and a wonderful screen. Whether or not the antenna design manifests itself as an issue really depends on AT&T’s coverage where you’re using the phone. As a result, AT&T can also share in the blame here. As I mentioned in our EVO 4G review, Sprint and Verizon appear to have slower data rates but more consistent coverage wherever I use them. In comparison, AT&T generally offers higher peak transfer rates but reception that varies more wildly.”
“but since i do work for AT&T, and since i have talked to AT&T customers, i know that they DO care about the bars. i cannot tell you how many times people will tell me, “hey, i am only getting one bar on my cell phone at my office”.
and i say, “well, can you make and receive calls?”
and they say, “Yes”.
then i say, “well, can you connect to the internet on your phone without any problems?”
and they say, “Yes”.
then i say, “well, what is the problem, then, sir?”
then they say, “but i am only getting one bar!” then i just smile to myself and try not to scream. it’s almost like the famous old “who’s on first” routine, but in real life.”
Iphone 4 soittaa ja datailee siellä missä muut puhelimet etsii verkkoa!!!