Ku dhawaad ​​​​taleefanka gacanta ee jira maanta wuxuu isticmaalaa SIM- kaarka. " SIM " waxay u soo gaaban tahay Module Aqoonsiga Macmiilka. ^{(Subscriber Identity Module.)}La'aanteed, ma wici kartid ama ma heli kartid telefoon. Sidoo kale ma isticmaali kartid wax xog internet ah oo ku saabsan isku xirka gacanta.

Waxaa laga yaabaa inaad hore u ogeyd, laakiin muxuu^{(why )} taleefoonkaagu faa'iido la'aan u yahay la'aanteed birahan yar iyo bacaha? Waa^(Just) maxay kaarka SIM- ka dhabta ah ee loo isticmaalo?

Sida SIM Card u ekaado^{(What a SIM Card Looks Like)}

Kaarka SIM-^{(SIM Card)} ka aad ayey u fududahay in la aqoonsado. Waa kaadh caag ah oo leh xidhidh bir ah oo kala duwan. Gudaha kaarka SIM- ka waxaad ka heli doontaa wareeg isku dhafan, kaas oo kula xiriira taleefanka iyada oo loo marayo xiriirada birta ah ee aan soo sheegnay.

Kaadhadhka SIM^(SIM) -ka waxay ku yimaadaan qaabab iyo cabbirro kala duwan. Dhab ahaantii, waxaa jira afar cabbir guud ahaan. Kan ugu weyn waxaa loo yaqaan "xajmiga buuxa" oo si wax ku ool ah waa duugoobay. Cabbiraadda 3.37 in by 2.125 in, kaadhadhka SIM^(SIM) -ka oo buuxa waxay asal ahaan le'eg yihiin kaadhadhka gelitaanka smart.

Sababta tani waa mid aad u xiiso badan. Bilowgii tignoolajiyada taleefanka gacanta, dad badan ayaa wadaagi lahaa hal taleefan. Fikradda waxay ahayd inaad geliso SIM kaarkaaga weyn taleefanka markaad rabto inaad isticmaasho. Maadaama kaarku uu waqti badan ku qaadan doono boorsadaada jeebka, marka loo eego talefanka, jidhka balaastigga ah wuxuu sameeyay macno qumman.

Maalmahan inta badan kaararka SIM-ka ee aad iibsan doonto waxay leeyihiin dhammaan saddexda cabbir ee caadiga ah, iyadoo qaybo ka mid ah balaastiggu ay kala go'ayaan ilaa aad ka gaarto cabbirka aad rabto. Cabbirka Mini-SIM waa wax aan caadi ahayn maalmahan waxaana inta badan loo adeegsadaa aaladaha dhaxalka ah ama aaladaha jaban ee ku saleysan naqshadihii hore.  

Cabbirka Micro-SIM waa mid aad loo jecel yahay oo inta badan taleefannada caadiga ah ayaa isticmaala tan. Cabbirka Nano -SIM wuxuu baabi'iyaa ku dhawaad ​​dhammaan jirka balaastiigga ah ee ku wareegsan xiriirada SIM- ka, wuxuuna asal ahaan ka yahay halbeegga calanka iyo talefannada casriga ah ee dhammaadka-dhamaadka sare ah, halkaasoo booska gudaha uu ku joogo qiimo aad u sarreeya. Kaadhadhka SIM^(SIM) -ka jidh ahaan baa fure u ah si aanay suurtogal u ahayn in si khaldan loo geliyo. 

Halkan waxaa ah tilmaan: ha iska tuurin Mini- iyo Micro -SIM frames marka aad hesho SIM card cusub. Haddii aad waligaa u baahato inaad SIM- ka u guurto talefan kale waxa laga yaabaa inaad weli u baahan tahay!

Muxuu Sameeyaa SIM Card?^{(What Does a SIM Card Do?)}

Shabakadda gacanta ee uu leeyahay adeeg bixiyahaagu waa kaas uun – shabakad. Waxay u baahan yihiin inay xakameeyaan cidda geli karta shabakaddaas sababo ammaan dartood iyo si ay wax walba u shaqeeyaan!

Haddaba waa maxay SIM Card? SIM kaarkaaga waa kaadhka gelitaanka Waxay ka kooban tahay aqoonsigaaga. Markaa macnahaas waxa ay la mid tahay kaadhka kaydiya magacaaga iyo eraygaaga sirta ah. Waxaad "la soo gashaa" shabakada gacanta adoo isticmaalaya SIM^(SIM) kaarka. Lambarka telefoonkaagu waa aqoonsigaaga shabakada gaarka ah. 

Meel kasta oo aad tagto, ilaa inta aad ku jirto meel u dhaxaysa taawar gacanta oo uu leeyahay adeeg bixiyahaaga, waa lagu heli karaa oo aad gaadhi kartaa kuwa kale.

Maxaa ku kaydsan SIM?^{(What’s Stored On a SIM?)}

Kaarka SIM- ka waxaa ku dul yaal macluumaad sheegaya in shabakadu u baahan tahay inay xaqiijiso akoonkaaga. Mid ka mid ah kuwan waa ICCID ama Aqoonsiga Kaarka Wareegga Isku-dhafan^{(Integrated Circuit Card Identifier)} . Kani waa lambar gaar u ah kaadhka SIM- ka ee gaarka ah.

Xogta xigta ee muhiimka ah ee SIM- ka waxaa loo yaqaan furaha xaqiijinta^{(authentication key)} . Kani waa furaha sirta ah ee loo isticmaalo in lagu saxiixo xogta loo diro shabakada gacanta. Furayaasha waxaa lagu socodsiiyaa shaqada cryptographic ka dibna marka la barbar dhigo xisaabinta kale ee lagu sameeyay nuqul ka mid ah furaha lagu kaydiyay xogta side. Haddi ay iswaafaqayaan, waxa laguu ogolanaya in aad gasho shabakada

SIM- ku waxa uu leeyahay xusuusta, taas oo aad ku kaydsan karto xiriiradaada iyo fariimaha qoraalka ah. Tani aad ayey u kooban tahay si kastaba ha ahaatee, iyadoo inta badan SIM^(SIMs) -yada ay ku ciyaaraan inta u dhaxaysa 64k iyo 256k ee meel bannaan. Maalmahan dadka intooda badan waxay ku fiican yihiin in ay ku kaydiyaan xiriirkooda xusuusta taleefanka, oo ay la socdaan kaydka iyaga oo isticmaalaya shay sida iCloud ama akoonkooda Google^{(Google account)} .

Qandaraaska iyo kaararka SIM-ka ee la sii bixiyay^{(Contract and Prepaid SIM Cards)}

Guud ahaan waxaa jira laba nooc oo bixiyayaasha gacanta ay adeegsato si ay uga iibiyaan adeegyadooda macaamiisha. Waxaad saxiixi kartaa heshiis go'an, ama waxaad noqon kartaa macaamiil hore loo bixiyay.

Labada xaaladoodba, waxaad heli doontaa SIM kaar. Kaararka laftoodu waxba kama duwana midba midka kale. Hase yeeshe, waa sida uu bixiyaha u maamulo akoontada taas oo iyaga ka dhigaysa. Waxaad ka iibsan kartaa kaararka SIM -ka ee hore ee khaanadda. Inkastoo waddamo badan ay tahay inaad iska diiwaan geliso iibka, adigoo isticmaalaya aqoonsiga dawladda iyo caddaynta deganaanshaha.

Kaararka SIM-ka ee heshiiska^{(Contract SIM)} waxa loo qoondeeyay xogta, wakhtiga hadalka iyo agabka kale sida uu heshiiskaagu dhigayo. Kharashaadka dheeraadka ah ayaa lagu daraa biilkaaga oo dhamaadka wareegga biilasha lacagta ayaa laga jarayaa akoonkaaga. Kaararka hore loo bixiyo, waxa aad inta badan ku shubi doontaa lacag SIM- ka ama haddii kale waxa aad hore u iibsan doontaa wakhtiga hadalka ama xogta mobaylka.

Iyada oo ku xidhan meesha aad ku nooshahay, telefoonnada gacanta ee qandaraasyada qaarkood waxa laga yaabaa in lagu xidho kaadhadhka SIM -ka oo keliya bixiyahaas. Badanaa tani waa qaab aad ku heli karto taleefoon qiimo dhimis la taaban karo, laakiin haddii aad waligaa u baahan tahay inaad isticmaasho SIM kaar kale, laga yaabee markaad safarka ku jirto, waxaad ogaan doontaa inuusan shaqaynayn! Si aad uga fogaato xaaladaas oo kale, hubi inaad raadiso telefoonada lagu iibiyo sida " unlocked ".

Bedelaadda SIM Cards^{(Switching SIM Cards)}

Ka qaadashada SIM-ka mid ka mid ah taleefoonka oo aad u guurto mid kale waa wax aan xanuun lahayn^{(pretty painless)} . Marka la eego in labada taleefanba ay isticmaalaan kaarka SIM- ka isku mid ah. Haddii taleefanka kale uu isticmaalo cabbir ka weyn, waa inaad isticmaashaa adabtarada si aad uga dhigto mid ku habboon booska weyn. Haddii kaarka SIM aad rabto in aad isticmaasho waa mid aad u weyn ee phone bartilmaameedka, waxaad leedahay laba doorasho.

Midka koowaad waa in SIM- ka hoos loo dhigo cabbirkiisa. Dadka qaarkiis ayaa ku dhiiran inay tan sameeyaan iyagoo isticmaalaya wax aan ahayn labo maqas iyo nooc ka mid ah qaab-dhismeedka. Haddii aad si lama filaan ah u jarto wareegga SIM- ka ee kaadhka, ciyaartu way dhammaatay oo waxaad u baahan doontaa mid cusub. Habka ugu badbaadsan ee tan lagu sameeyo waa adiga oo isticmaalaya qalab goynta SIM- ka oo go'an. ^(SIM)Xitaa markaa, waxaad halis u tahay inaad baabi'iso kaadhka, markaa qaado dariiqan adiga oo kaliya khatartaada.

Doorashada kale waa in la beddelo kaararka SIM . Dabcan, haddii aad hadda uun dibadda u baxday oo aad iibsatay SIM kaar cusub, waxa uu yeelan lahaa nambar telefoon oo ka duwan oo ku xidhan! Adeeg bixiye kastaa wuxuu yeelan karaa habraac ka duwan si lambarkaaga taleefanka looga raro hal SIM loona wareejiyo mid kale.

Guud ahaan si kastaba ha ahaatee, waa inay si fudud u qaadato wicitaan telefoon iyo xaqiijinta aqoonsigaaga. Haddii bixiyaha uu leeyahay dukaamo jireed, waa inaad xitaa haysataa ikhtiyaarka aad ku geli karto SIM- ka cusub , oo uu kaagii hore naafo yahay.

Maalmahan waxa caan ah in la isticmaalo fariimaha qoraalka ah ee loo soo diro SIM- cards-ka nooc ka mid ah xaqiijinta laba-factor. Markaa hadda waxaan haynaa wax loo yaqaan ' SIM-swap fraud' . Halka ay dambiilayaashu ka helaan dariiqooyin ay lambarka taleefankaaga ugu wareejin karaan SIM- ka ay gacanta ku hayaan. Duubista SIM^(SIM) waa hab kale. Waa hubaal inay tahay wax laga fiirsado.

Nolosha Ka dib SIM Cards^{(Life After SIM Cards)}

Kaadhadhka SIM^(SIM) -ka, ugu yaraan SIM- kaarka SIM-ka ee gaarka ah, runtii lagama maarmaan ma ahan. Waxaan horeyba u aragnay kor u kaca eSIM -ka ama kaarka SIM-^{(embedded SIM )} ka ee guntan . Kani waa SIM-kadh^(SIM) si toos ah taleefanka loogu dhex dhisay. Kaarkani waa mid barnaamijaysan, taas oo macnaheedu yahay inaad si fudud u bedeli karto bixiyeyaasha ama aad isticmaali karto bixiyeyaal badan hal mar.

Wadamada qaarkood, telefoonada "dual -SIM " ayaa ahaa kuwa caan ah. Kuwaas waxaad ku yeelan kartaa laba lambar oo telefoon, mid shakhsi ahaan loo isticmaalo, tusaale ahaan. Waxa kale oo aad haysataa kaadhka SIM- ka xogtiisa gaarka ah, lagana yaabo inuu leeyahay qiimayaal wanaagsan.

eSIM-yada ayaa tan ka dhigaya mid aan badnayn oo u beddela gelitaanka iyo xaqiijinta shay la mid ah isticmaalka khadka fidsan. Halkaas oo aad si fudud u geliso isticmaale-magaca iyo erayga sirta ah si aad u gasho adeeg bixiye la siiyay.

Tilifoono yar oo hadda jira ayaa ku dhejiyay SIM- kaadhadhka wakhtiga qorista, laakiin taasi waxay ku dhowdahay inay isbedelaan marka warshaduhu qaataan heerkan cusub. Taleefankaaga soo socda ayaa laga yaabaa inaadan si fiican u haysan meel aad ku dhejiso SIM- kaarka gabi ahaanba, taas oo noqon doonta dhamaadka xilli, laakiin dhab ahaantii u dhaqaaq dhanka wanaagsan.

What Is a SIM Card Used For?

Jυst about every cellular telephone in exіstence today makes use of a SІM card. “SIM” is short for Subscriber Identity Module. Without it, you can’t make or receive phone calls. You also can’t use any internet data over a cellular connection.

You probably already knew this, but why is your phone so useless without this small piece of metal and plastic? Just what is a SIM card actually used for?

What a SIM Card Looks Like

A SIM Card is pretty easy to identify. It’s a plastic card with a distinct set of metal contacts. Inside the SIM card you’ll find an integrated circuit, which communicates with the phone through the aforementioned metal contacts.

SIM cards come in a variety of shapes and sizes. In fact, there are four sizes in total. The largest is known as “full-size” and is effectively obsolete. Measuring 3.37 in by 2.125 in, full-size SIM cards were basically the size of smart access cards.

The reason for this is quite interesting. At the outset of mobile phone technology, multiple people would share a single phone. The idea was that you would insert your enormous SIM card into the phone when you wanted to use it. Since the card would spend more time in your wallet than in a phone, the large plastic body made perfect sense.

These days most SIM cards you’ll buy have all three of the common sizes, with pieces of the plastic body breaking away until you reach the size you want. The Mini-SIM size is pretty uncommon these days and is mostly used in legacy devices or low-cost devices based on older designs.  

The Micro-SIM size is very popular and most mainstream phones use this. The Nano-SIM size eliminates virtually all plastic body around the SIM contacts and is essentially the standard for flagship and mid-high-end smartphones, where internal space is at an extreme premium. SIM cards are physically keyed to make it impossible to insert them the wrong way around. 

Here’s a tip: don’t throw away the Mini- and Micro-SIM frames when you get a new SIM card. If you ever need to move the SIM to another phone you may still need them!

What Does a SIM Card Do?

The cellular network owned by your service provider is just that –  a network. They need to control who has access to that network both for security reasons and to make the whole thing work!

So what is a SIM card? Your SIM card is an access card. It contains your credentials. So in that sense it’s like a card that stores your username and password. You “log in” to the cellular network with the SIM card. Your phone number is your unique network identity. 

No matter where you go, as long as you are within range of a cellular tower belonging to your service provider, you can be reached and reach others.

What’s Stored On a SIM?

The SIM card has information on it that the network needs to authenticate your account. One of these is the ICCID or Integrated Circuit Card Identifier. This is a number that’s unique to that specific physical SIM card.

The next important bit of data on the SIM is known as the authentication key. This is a cryptographic key used to sign data sent to the cellular network. They key is run through a cryptographic function and then compared to another calculation done with a copy of the key stored in the carrier’s database. If they match, you’re let onto the network.

The SIM also has memory on it, that you can use to store your contacts and text messages. This is pretty limited however, with most SIMs sporting between 64k and 256k of space. These days most people are better off storing their contacts on the phone’s own memory, along with a backup using something like iCloud or their Google account.

Contract and Prepaid SIM Cards

There are generally two models cellular providers use to sell their services to customers. You can sign a fixed contract agreement, or you can be a prepaid customer.

In both cases, you’ll get a SIM card. The cards themselves are no different from each other. Rather, it’s how the provider handles the account that sets them apart. You can buy prepaid SIM cards off the shelf. Although in many countries you must register the purchase, using government ID and proof of residence.

Contract SIM cards are allocated data, talk time and other resources according to your contract. Overages are added to your bill and at the end of the billing cycle the money gets deducted from your account. With prepaid cards, you’ll usually load a monetary amount onto the SIM or otherwise purchase talk time or mobile data upfront.

Depending on where you live, certain contract handsets may be locked to SIM cards only from that provider. Often this is a way to get a phone for a substantial discount, but if you ever need to use another SIM card, perhaps when travelling, you’ll find that it doesn’t work! To avoid that sort of situation, be sure to look for phones sold as “unlocked”.

Switching SIM Cards

Taking a SIM from one phone and moving it to another is pretty painless. Given that both phones use the same SIM card size. If the other phone uses a larger size, you’ll have to use an adapter to make it fit the larger slot. If the SIM card you want to use is too large for the target phone, you have two choices.

The first is to cut the SIM down to size. Some people are brave enough to do this using nothing but a pair of scissors and some sort of template. If you accidentally cut into the circuity of the SIM card, it’s game over and you’ll need a new one. The safest way to do this is by using a dedicated SIM cutting tool. Even then, you run the risk of destroying the card, so take this route only at your own risk.

The other option is to switch SIM cards.  Of course, if you just went out and bought a new SIM card, it would have a different phone number associated with it! Each service provider may have a different procedure to move your phone number from one SIM to another.

In general however, it should simply take a phone call and verification of your identity. If the provider has physical stores, you should even have the option of going in for a new SIM, with your old one disabled.

These days it’s popular to use text messages sent to specific SIM cards as a form of two-factor authentication. So now we have something known as SIM-swap fraud. Where criminals find ways to have your phone number transferred to a SIM they control. SIM duplication is another method. It’s certainly something to watch out for.

Life After SIM Cards

SIM cards, at least discrete SIM cards, aren’t really necessary anymore. We are already seeing the rise of the eSIM or embedded SIM card. This is a SIM card built directly into the phone. This card is programmable, which means you can easily change providers or use multiple providers at once.

In some countries, “dual-SIM” phones have been very popular. With these you could have two phone numbers, one for personal use, for example. You could also have a dedicated data SIM card, perhaps with better rates.

eSIMs make this redundant and turns access and authentication into something similar to fixed-line broadband usage. Where you simply enter a username and password to access a given service provider.

Few current phones have embedded SIM cards at the time of writing, but that’s set to change as the industry adopts this new standard. You next phone might very well have no place to put a SIM card at all, which would be the end of an era, but certainly a move for the better.

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