Mobile Devices – VRPC.COM

T-Mobile to offer 3G data service for iPhones

Posted on January 30, 2012 - April 24, 2017 by vrpc

Great news (rumor) after the failed AT&T & T-Mobile merger, T-Mobile should be granted to use some of the AT&Ts spectrum to be compatible with the iPhone 3G frequency.

http://9to5mac.com/2012/01/11/t-mobile-w…ore-130155

iOS 4 pdf vulnerability

Posted on July 13, 2011 - April 24, 2017 by vrpc

Another reason to jailbreak Smile

If your iPhone or iPad is free from apple you can protect yourself against the PDF vulnerability.
Here is more info:
http://www.iphonehacks.com/2011/07/insta…ility.html

The other option is not to open PDF files from untrusted sources and wait for apple to fix it.

iPhone stand

Posted on July 8, 2011 - April 24, 2017 by vrpc

The simplest and most portable design I found is done from a business card. (This one requires some work Smile )

Here is the link: http://www.instructables.com/id/Simple-b…Pod-stand/

My second choices:
BatRest iPhone folding stand I found on thinkgeek is listed as a iPhone 3G compatible but after talking to the customer support I was assured it works with iPhone 4.
I will update after I test it out myself. here is the link: http://www.thinkgeek.com/gadgets/cellphone/b6f5/

There are couple more choices but the two first choices I listed are the same size as a business card and will easily fit in my compact wallet.

other options:
http://www.myibend.com/
http://www.seskimo.com/index.php

Apple unlocked iPhone 4 in the US

Posted on June 14, 2011 - April 24, 2017 by vrpc

Apple unlocked iPhone 4 in the US

Will this happen on Wednesday 6/15/11 ?
update: Apple Store
unfortunately it is only GSM phone with the limitations listed below.More and more sources are reporting this info about factory unlocked iPhone.
Already many countries around the world sells unlocked iPhone and the closest one is Canada.The bad news would be high price ~ 600 additionally there is no information indicating if the phone would be both GSM and CDMA as well as no indication about including 1700mhz frequency which is missing for 3G usability on the t-mobile network in the US.The good news would be for the GSM version of the phone there is no need for contract on ATT, usable as a phone around the world without the hustle of software/ hardware unlock.http://www.zdnet.com/blog/btl/unlocked-i…ag=nl.e550
http://www.amazon.com/Apple-16GB-Quadban…769&sr=8-2
http://vrpc.com/att-vs-t-mobile-frequency/

Cell Towers

Posted on June 10, 2011 - April 24, 2017 by vrpc

It is not always easy to know the location of nearby cell towers.

If you need this info here is one link which can help:
All US cell carriers:
http://www.cellreception.com/towers/or one for T-Mobile towers:
http://t-mobiletowers.com/towersearch.as…&zip=90025

AT&T VS T-Mobile Frequency

Posted on June 4, 2011 - April 24, 2017 by vrpc

T-Mobile

Frequency on UMTS (W-CDMA)/HSPA 3G (not true 4G)
1700 MHz/2100 MHz
Frequency on GSM/GPRS/EDGE 2G
850 MHz and 1900 MHz
http://en.wikipedia.org/wiki/T-Mobile_USA

AT&T
Frequency on UMTS/HSPA 3G
850 MHz/ 1900 MHz
Frequency on GSM/GPRS/EDGE 2G
850 MHz and 1900 MHz
http://en.wikipedia.org/wiki/AT&T_Mobility

Free your iPhone from Apple

Posted on June 3, 2011 - April 24, 2017 by vrpc

good links to start:

http://blog.iphone-dev.org/
http://www.iphonehacks.com/
http://iclarified.com/tutorials/iphone/index.php

Make sure to read carefuly if you need your phone to be unlocked and used on different cell provider beside ATT.