phones

A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from Greek: τῆλε (tēle, far) and φωνή (phōnē, voice), together meaning distant voice. A common short form of the term is phone, which came into use almost immediately after the first patent was issued.In 1876, Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice at a second device. This instrument was further developed by many others, and became rapidly indispensable in business, government, and in households.
The essential elements of a telephone are a microphone (transmitter) to speak into and an earphone (receiver) which reproduces the voice in a distant location. In addition, most telephones contain a ringer to announce an incoming telephone call, and a dial or keypad to enter a telephone number when initiating a call to another telephone. The receiver and transmitter are usually built into a handset which is held up to the ear and mouth during conversation. The dial may be located either on the handset or on a base unit to which the handset is connected. The transmitter converts the sound waves to electrical signals which are sent through a telephone network to the receiving telephone, which converts the signals into audible sound in the receiver or sometimes a loudspeaker. Telephones are duplex devices, meaning they permit transmission in both directions simultaneously.
The first telephones were directly connected to each other from one customer's office or residence to another customer's location. Being impractical beyond just a few customers, these systems were quickly replaced by manually operated centrally located switchboards. These exchanges were soon connected together, eventually forming an automated, worldwide public switched telephone network. For greater mobility, various radio systems were developed for transmission between mobile stations on ships and automobiles in the mid-20th century. Hand-held mobile phones were introduced for personal service starting in 1973. In later decades, their analog cellular system evolved into digital networks with greater capability and lower cost.
Convergence in communication services has provided a broad spectrum of capabilities in cell phones, including mobile computing, giving rise to the smartphone.

You do not have permission to view the full content of this post. Log in or register now.
  1. Y

    Help Google pixel phones

    price qoute po
  2. A

    Bang for the buck Android phones? (Budget 3k-5k) please recommend me.

    Hello PHC! Asking lang po ano pong magandang cheap phones in 3k-5k budget? Preferably Android Phone! (No to iPhone muna kasi main phone ko iPhone na hahaha) Pang backup side phones for college lang po sana, +1 if capable of low to mid tier gaming. The more budget friendly the better. 2nd hand...
  3. L

    Help Interior and Exterior House design app for android phones Meron po?

    Guys Baka meron kayong gamit jan for android pa share naman po. Thank you. if my modded much appreciated. Thank you
  4. D

    Help Gumagana ba Go5g sa mga 4g supported na phones?

    May balak Kasi sana Ako mag avail ng go 5g 299
  5. J

    Xiaomi Phones

    Pano ba palitan Yung network band ng Xiaomi phone? Specifically Yung sa snapdragon Cno nakakaalam ng code para sa band mode?
  6. C

    LF Android Phones Supplier

    Hello guiz, so meron akong maliit na online shop dito samin local lang ako nagpapa order bali wala na kasi yung previous supplier ko ng cellphones. So nag hahanap ako ng bagong supplier na mas lower sa mall ang price kaso wla talaga ako mahanap. Hindi nman pweding direct ako sa mga mall kasi...
  7. J

    Help Bakit mas marami ang gusto ng iPhone kaysa Android phones?

    gusto ko ma upgrade ng Phone kasi nalilito ako kung ano pipiliin ko...
  8. R

    Z3X Tools for samsung phones

    pang program or pang ayos ng imei at iba pa Hidden content
  9. N

    Help XOS to Xiaomi phones

    may nakapag try na ba sa inyo mag install ng xos rom galing sa infinix into xiaomi phones??
  10. B

    Question po about sa poco phones

    May ads ba ang poco phones? experience ko po kasi sa xiaomi phone may ads siya di tulad ng samsung
  11. J

    Referral Shopee Budget Friendly Phones 1,000 Off

    Tecno Spark Go 2023 ( 3GB + 64GB ) https://shope.ee/8ey7mZRxfF Tecno Spark 10 https://shope.ee/9UXEmAVu6O Infinix Hot 30i https://shope.ee/8KLCH1C6mu Itel A60s https://shope.ee/7KSlrxSX2I Claim 30% off capped at 1,000 here: https://shope.ee/7ziQzI9VS4 Earn rewards po kada mag-oorder kayo...
  12. F

    Google pixel phones at apple phones naguusap haha

    di akin ang source na ito copy paste lang po kaya credits sa original uploader Google has released a bunch of new Pixel commercials featuring the Apple iPhone. The ads are part of Google's latest campaign called #BestPhonesForever where the smartphones are involved in some dramatic humorous...
  13. J

    Referral Shopee Big Discount on Mobile Phones P2k lang

    Tecno Spark Go 2023 https://shope.ee/AUPgqx58mx Infinix Hot 30i https://shope.ee/8KLCH1C6mu P1,000 off agad Claim voucher here: https://shope.ee/1q7aQ3lJBV Earn rewards po kada mag-oorder kayo sa Shopee and Lazada (Sayang ang rewards!) Details: Referral - RewardMe (Para sa mga mahilig...
  14. J

    Help 10-25k budget phones

    Hi mga boss pa help sana ako kung ano magandang phone sa price range na ganito (10-25k) nagpapatulong kapatid ko Malaki storage Good in camera Makapag edit sa Microsoft (pdf) mga ganun
  15. A

    Help Phones under 10l

    Pa suggest po ng phones under 10 yung makikita lng sa mga physical store sa Philippines
  16. C

    Help Suggestion po phones under 17-18k

    Pahelp po di kasi ako makapagdesisyon sa phone between 17-18k yun wala po sana risk sa deadboot na may goods na chipset at may goods na camera yun the best po sana sa price na yan expected naman po na pang mid range lang talaga budget ko gusto ko lang po sana masulit yun 17-18k ko salamat po
  17. K

    Phones under 12k

    any recommendations na phone under 12k po.
  18. P

    Trivia 2022 and 2023 BEST PHONES UNDER PHP15K-20K TIER LIST!

    2022 and 2023 BEST PHONES UNDER PHP15K-20K TIER LIST! Hidden content
  19. M

    Help Pwede ba gomo sa globe locked phones?

    thanks sa sasagot.
  20. Y

    Help ABOUT PHONES

    Anu mas maganda pang gaming na phone worth 5k to 6k below mga paps Yung kaya mag call of duty or mobile legends
  21. P

    Vanced / Revanced Tips for Low-End Phones

    For Low-End Phone: Tips para medyo maging Smooth si Vanced/Revanced YøùTùbé. Hidden content
  22. C

    Help Super fast charging issue on samsung phones

    Nawala daw yung super fast charging sa samsung phones after the latest update peru makikita mo daw sa battery settings. Blue parin pa ang plugin animation sa inyo mga sir pag ka saksak niyo ng charger
  23. S

    Closed Flip phones

    Hello. Sino dito meron na Samsung Folder 2 or LG x100 Smart Folder? Or any other flip phones devices with Wifi connectivity. If yes, saan nyo po nabili? I’m planning to buy kasi.
  24. J

    Referral ROO Pre-Registration Event! $1 million in-game items & HUAWEI phones await!! First Prize (10 winners): HUAWEI Mate 50 PRO!

    Giveaway Link: ROO Pre-Registration Event! $1 million in-game items & HUAWEI phones await!! Event Period Until 4/5 11:00 AM (GMT+7) Event Rewards First Prize (10 winners): HUAWEI Mate 50 PRO (equivalent value $1,077); Second Prize (20 winners): Razer Keyboard and Mouse Combo...
  25. J

    Help Huawei phones? my chance pa ba na mag karoon ng google services?

    Guys magandang umaga! mag tatanong lang kung worth it paba bumile ng huawei phone specially yung wala nang google services.
  26. M

    Question for Deadboot Issue on Gaming Phones

    Niswap ko poco x3 pro ko na 8+3/256 add ako 2.5k sa black shark 2. Kinatatakutan ko kasi sa poco x3 pro anytime pwede daw madeadboot kaya minadali ko swap sa black shark 2. Kaso sabi naman ng iba meron din black shark 2, kaya di na ako mapakali kung san ba talaga ako magstastay HAHAHAHA. May...
  27. J

    BEST BUDGET PHONES UNDER 10K

    Balak ko kasi bumili ng cp since nadukutan ako ng cp last valentines, any suggestions na cp na sulit under 10k? Thanks!
  28. V

    Help Gaming Phones 9k budget

    Good Morning mga lods! Hidden content
  29. M

    Help Best Camera Phones

    Hello Ask ko lang sana kung ano maganda na android phone cam na pwde ilaban kay iphone cam? TIA :)
  30. P

    Help Network ng GTM sa redmi phones nag rereset??

    bakit ganon nag rereset ang data ko sa phone na redmi pero mga vivo or oppo di nakan kahit na naka set na sa battery na hindi mamatay data pag naka sleep.. patulong nga po ng dapat gawen salamat
  31. E

    Tutorial Disable|Fix FPS Capping/Throttling on MIUI phones (no root/with root)

    What's FPS capping? Yung kahit kaya/supported naman ng device mo yung 120FPS/90FPS sa ML, naka max na din graphics settings pero hanggang 60FPS lang talaga. Common issue eto sa MIUI 13 at MIUI 14 devices. Madali lang din naman fix nyan, either magisk modules, lsposed modules or yung pinakasimple...
  32. C

    Mobile phones lower than 10k

    Hello po, sinu gustong ng android phone, NTC APPROVED po Brand new sealed
  33. M

    Help Looking for Suggestion of Phones around 20K to 30k

    Hi guys! Crowdsourcing lang ng phone na sa tingin nyo e good buy Criteria: Around 20 to 30k. wiling to go 35k basta sulit High end/flagship level Amoled Sana Good cam, and good for games at least latest model sana 2022 and up release date 5G Salamat po sa inyong mga maimumungkahi!
  34. X

    Help Bandlock on Phones

    Sino po marunong mag bandlock sa phones and possible po ba un?
  35. 1

    Help Recommend phones

    Guys recommend naman jan ng gaming phone yong same na kasing lakas ni xiaomi 12t pero low price lang maraming salamat.
  36. P

    Tutorial HOW TO GET RID OF ANNOYING POP-UP ADS IN ANY ONLINE PLATFORM TO ANY IOS/ANDROID PHONES _TUTORIAL_FREE MOVIES ONLINE s†rêâmïng APP.

    HOW TO GET RID OF ANNOYING POP-UP ADS IN ANY ONLINE PLATFORM TO ANY IOS/ANDROID PHONES _TUTORIAL_FREE MOVIES ONLINE s†rêâmïng APP. 👇👇👇 Hidden content Along with the Gods: The Two Worlds and FREE ONLINE s†rêâmïng APP: 👇👇👇 Hidden content
  37. G

    Help Best Phones Under 10k 2023?

    Mga Lods pa advice naman kung anung magandang phone under 10k. na sulit Thank you Godbless to All ;)
  38. C

    Help Ebook For Repairing Mobile phones.

    meron po ba kayong digital book na ganito po? salamat po sa may makakapag láρág ng link .
  39. D

    Help DITO SIM NO signal sa US Variant na Iphone and Samsung Devices pero sa ibang local phones meron naman

    Good day po mga ka PHC, both Samsung phone ko at Iphone (both US Variant) nawawala ang signal sa DITO pag umuuwi ako dito sa bahay, sinalpak ko ang sim sa isang iphone ko na Taiwan variant nag kaka signal naman possible kaya sa frequency na gamit ng DITO, dito sa amin? ang us variant na...
  40. P

    Android App HOW TO GET RID OF ANNOYING POP-UP ADDS IN ANY ANDROID PHONES

    HOW TO GET RID OF ANNOYING POP-UP ADS IN ANY ANDROID/IOS PHONES Hidden content
  41. B

    For Sale Mobile phones (Android phone Samsung and LG)

    KOREAN VARIANT PO ITO (NOT CLONE/FAKE/ρrémíùm COPY) 2ND HAND UNITS 📱APPLE FU 12 promax 512gb : 49k 📱 SAMSUNG Galaxy buddy 128gb : 9.5k Zflip1 256gb : 17k Zflip 2 5g 256gb : 18.5k Zflip 3 5g 256gb : 27k S10 5g 256gb : 13.8k S20fe 5g 128gb : 15k S20 5g 128gb : 16k S20plus 5g 256gb : 17.5k...
  42. U

    Suggest Phones for Vlogging

    Mga paps anu magandang phone pang vlog at maganda camera, ung affordable lang sana , mga 7 to 10k budget?
  43. R

    Asus Reveals Android 13 Update Schedule for Its Phones; Check out the List!

    Asus has revealed that will start providing the Android 13 flavor to the Zenfone 9, which is its current flagship phone. This will start in December 2022. To recall, it released the Android 13 beta update for the Asus Zenfone 9 back in August. All its smartphones are expected to get Android 13...
  44. L

    Meron pa bang 5.7 inch phones sa market?

    Hello po, hingi lang po sana ako ng suggestions kasi naghahanap po ako ng phone na may 5.7-inch display. Preferably octa-core, at least 3/32, at under 10k. Bibilhan ko po sana mama ko eh hindi niya type ung mga 6+ inch phones ngayon hehe
  45. J

    HELP - CLONING APP FOR MOBILE PHONES

    Baka po meron kayo cloning software para sa mobile phones?
  46. G

    Help About mga phones ngayon

    Bakit puro amoled at super amoled na mga phones ngayon ..e madali lang naman magka screen burn issue..
  47. F

    Help Magandang Camera phones under 15k

    ano po magandang camera phones under 15k? balak ko bumili ng Redmi note 11s not the 5G variant. kasi yung 5G is 50mp lang
  48. G

    Help Mga phones ni oppo ngayon

    Ok ba yung mga oppo ngayon..ok din ba sa gaming???.....realme 9 available dito samin prang pangit ng snapdragon 680 ..
  49. M

    Trivia 10 surprising facts about cell phones

    10 surprising facts about cell phones June 18,2019 (Tuesday) Credits to : ( original post ) 10 surprising facts about cell phones - JN8【japan navi 8】 10 surprising facts about cell phones Ilan sa mga cellphone facts na ito ang alam mo na? Ang unang “phone call” ay ginawa noong 1974 ni...
  50. A

    Gaming phone suggestion 10k-12k

    Mga idol, pa suggest naman po. May 11k po ako na hawak. pa suggest magandang gaming phone na available ngayon. mukang kulang maging source yt kase andame atang di ko nakikita . Maraming salamat po
Back
Top