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goldworldnet

To: goldworldnet who wrote (100793)	6/24/2018 12:06:02 PM
From: Eric L	1 Recommendation of 110581

The GSM/3GPP and (obsolete) 3GPP2 family of mobile wireless technologies ... << After reading your post more closely, it doesn't address phones being locked, which they still are by some carriers. >> There are no CDMA-only and a continually diminishing number of TDMA based GSM-only networks in the world today. All 4 major US and the Canadian mobile wireless network 'carriers' operate OFDM based 4G LTE networks standardized in 3GPP regional SDOs although they all still employ obsolete (i.e. no longer in development) legacy networks to carry voice or voice and packet data in combination with LTE for fallback or use in rural areas. Not all Verizon Wireless phones are carrier locked. This is Verizon's phone unlocking policy: verizon.com Sprint's is a little more complex situation and Sprint mult-mode, multi-band phones are less likely to be capable of being walked to other (non-Sprint affiliated) networks than a considerable number of Verizon phones can be. It will get more complex initially if T-Mobile USA completes its acquisition of Sprint which it likely will. I commented on 'GSM" and 'CDMA' networks on this board a year ago. Message 31083624 These are the mobile wireless network standards and technologies that were once, or are now deployed worldwide: Cheers, - Eric L. -

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