Author Topic: EEVblog #514 - $5 Mobile Phone Teardown - LG800G  (Read 16344 times)

0 Members and 1 Guest are viewing this topic.

Offline Stonent

  • Super Contributor
  • ***
  • Posts: 3824
  • Country: us
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #25 on: September 07, 2013, 06:33:16 am »
Here's an antenna from an old Blackberry 7230


The larger the government, the smaller the citizen.
 

Offline amyk

  • Super Contributor
  • ***
  • Posts: 6103
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #26 on: September 09, 2013, 07:10:17 pm »
external antenna jack

I have seen similar looking jacks on other phones, buried inside the battery compartment or behind a rubber seal.

I do not recognise the connector.  Is it a standard or something specific manufacturer by manufacturer?  Can you buy mating connectors from mouser or somewhere?  What is the standard?

Besides connection for car/base-station external aerial, another use might be for testing, to allow verification of the RF section during manufacturing -- especially full power output and high sensitivity.  Doing those tests through pads might be too noisy.
Might be Hirose U.FL.
 

Offline GeezerWhiz

  • Newbie
  • Posts: 4
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #27 on: April 12, 2015, 05:49:49 am »
On the subject of phone cost:  For many years, I have found cell phone deals (for an "emergency" glove box phone) leaving me with lots of left over phones.  This is by design.  Thru Amazon, I found a site called ShopCellDealsDotCom for Tracfone service with the LG800.  The total cost for service is (I'm still using them) US$ 2.53/month, for an LG800 with one year of service included and triple time for life, and a 3 month/200 minute card.  So, that's 15 months of service with 600 minutes, and a free (post paid) phone.  I bought 4 of them, or 5 full years of cell service with 2400 minutes (40 hours voice/ 20 hours data) time (both are transferred when phone changes, so no losses).  At the deal end, I have 4 phones with switcher off-line power supplies.  One is kept complete for battery charging.  The remaining 3 are chopped down until only a skinny plastic battery holder remains, which then go into small portable electronic projects I build.  With the super cheap cell service, and 4 Lipo batteries I can use, I consider the LG800 phones to be totally free.  This is the third time I have gone thru a gob of cheap phones (Nokia, then Motorola) and been left with Lipo batteries (and a charger) that would not be cheap to purchase, a nice freebie for projects!

How can Lipo batteries with charger be cheaper than that?
 

Offline ale500

  • Frequent Contributor
  • **
  • Posts: 307
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #28 on: January 06, 2016, 03:03:07 am »
I know this is an old thread but I just saw this video, and Dave mentions the keypad "domes". Does someone knows a bit more about where can I buy like 40 pieces ? I found Snaptron as manufacturer but Digikey, Mouser or Farnell seem not to carry them.
 

Online bitwelder

  • Frequent Contributor
  • **
  • Posts: 767
  • Country: fi
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #29 on: January 06, 2016, 05:06:54 am »
I know this is an old thread but I just saw this video, and Dave mentions the keypad "domes". Does someone knows a bit more about where can I buy like 40 pieces ? I found Snaptron as manufacturer but Digikey, Mouser or Farnell seem not to carry them.
Something like these?
http://www.aliexpress.com/item/100pcs-lot-ultra-slim-diameter-3mm-mobile-phone-key-keypad-switch-touch-metal-shrapnel-round-circle/32454582575.html
 

Offline ale500

  • Frequent Contributor
  • **
  • Posts: 307
Re: EEVblog #514 - $5 Mobile Phone Teardown - LG800G
« Reply #30 on: January 06, 2016, 04:25:34 pm »
Yeah, exactly that. Good find, now why the other distributors don't carry them ?... o well.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf