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Apple (AAPL) CEO Steve Jobs received a heads-up warning about potential iPhone 4 reception problems early in the planning process from the company's senior antenna expert, according to a Bloomberg ...
It's been nearly three weeks since the iPhone 4 went on sale. But it wasn't until yesterday that Consumer Reports, the ultimate authority in which big-ticket items to buy and which to bypass ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 February 2025. 2010 smartphone by Apple "iPhone 4G" redirects here. For the first iPhone with 4G networking, see iPhone 5. Not to be confused with iPhone 4s. iPhone 4 iPhone 4 (GSM model) in black Developer Apple Inc. Manufacturers Foxconn (UMTS/GSM model) Pegatron (CDMA model) Type Smartphone ...
It shouldn't be surprising that rival cell phone manufacturers weren't thrilled when Apple (AAPL) CEO Steve Jobs said the iPhone 4's antenna problems aren't specific to that device but rather are ...
Template: CDMA. 4 languages. ... Download QR code; Print/export Download as PDF; ... Template documentation. Usage Pages that use this template ...
An analogy to the problem of multiple access is a room (channel) in which people wish to talk to each other simultaneously. To avoid confusion, people could take turns speaking (time division), speak at different pitches (frequency division), or speak in different languages (code division).
It's the ultimate of ironies that Apple's externalized antenna array in the iPhone 4 -- hoped (and hyped up) to finally give us a phone every bit as good the rest of the device -- has become the ...
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.