SIM Info – Quick Self-Service Codes for Your Own SIM (2026)

Last updated: 28 July 2026 | Codes reviewed against operator-published USSD listings for Jazz, Zong, Telenor, and Ufone; verify against your operator’s official app if a code doesn’t respond, since USSD codes are periodically updated.

Most “SIM Info” searches aren’t about identity verification at all — they’re about a quick, everyday question: how much balance do I have left, what’s my own number, how much data is remaining, or what’s my SIM’s IMEI? This page is built specifically around that practical, self-service side of SIM information — the dial codes, USSD shortcuts, and quick checks every Pakistani mobile user reaches for regularly, gathered in one place by network. If what you actually need is to check which SIMs are registered under your CNIC for identity-verification purposes, that’s a different and more detailed process covered on our Live Tracker page — this page is the fast, daily-use reference instead.

Published as part of SIM Owner Details, our focus across this site is Pakistani telecom literacy, and this particular page is kept intentionally practical: dial codes, expected results, and honest notes on where codes vary by operator or change over time.

Balance Check Codes by Network

The most commonly cited balance-inquiry USSD codes across Pakistani networks are:

Dial the relevant code directly from the SIM you want to check, and your current balance appears on screen within seconds. A small inquiry charge (typically a fraction of a rupee plus tax) may apply on some networks — this is standard across the industry and not specific to any one operator.

Remaining Data (MB/GB) Check Codes

Checking how much of your active internet package remains uses a separate code from your general balance:

Because operators occasionally restructure their USSD menus, these codes are the most consistently reported ones as of this writing — if one doesn’t return a result on your device, the corresponding operator app (Jazz World, My Zong, My Ufone, My Telenor) always shows the same information without relying on a code at all.

How to Check Your Own SIM Number

Forgetting your own number happens more often than people admit, especially with a secondary or rarely-used SIM. Each network offers a way to retrieve it, even with zero balance:

These “check my number” methods work independently of your balance, since they’re informational queries rather than billed services on most networks.

Checking Your Phone’s IMEI (Not Your SIM, But Frequently Confused With It)

A related but genuinely separate check people often look for alongside “SIM info” is their device’s IMEI. Dialing *#06# on any phone — regardless of network or SIM inserted — instantly displays your device’s IMEI number(s) on screen. This identifies your handset, not your SIM or subscriber identity, and is checked through PTA’s separate DIRBS system if you need to confirm your device is properly registered for use in Pakistan. We cover this distinction in more depth on our SIM Information page, since SIM information and IMEI/device information are frequently — and incorrectly — treated as the same thing.

Finding Your SIM’s ICCID

Every physical SIM card carries a printed ICCID (Integrated Circuit Card Identifier) — a long numeric string usually printed directly on the card itself, and also retrievable from your phone’s settings menu under SIM status or network information. This number uniquely identifies the physical SIM card (distinct from your phone number, which is tied to the subscriber account rather than the physical card). It’s occasionally requested by customer support when troubleshooting activation issues, eSIM conversion, or SIM replacement, so knowing where to find it — either the printed card or your device’s settings — saves a step during those interactions.

Checking Your SIM’s Network Mode (2G/3G/4G/5G Status)

Most Android and iOS devices let you check and manually set your preferred network mode through Settings > Network & Internet > Mobile Network > Preferred Network Type (the exact path varies slightly by device manufacturer and OS version). This shows whether your SIM is currently connected via 2G, 3G, 4G/LTE, or — where available — 5G, and lets you force a specific mode if you’re troubleshooting a connectivity issue rather than relying on automatic network selection.

Checking APN Settings for Mobile Data

If mobile data isn’t working despite having an active package, incorrect APN (Access Point Name) settings are a common cause. Each network publishes its correct APN configuration:

Most modern smartphones configure the correct APN automatically upon SIM insertion, so manual APN checks are usually only necessary after a factory reset, a SIM swap between devices, or when using an unlocked or imported phone that didn’t auto-detect the correct regional settings.

Checking SIM Validity and Expiry (Prepaid)

Prepaid SIMs in Pakistan carry a validity period tied to your most recent recharge, and letting a SIM go inactive for an extended period can eventually lead to the number being recycled by the operator. Each operator’s balance-check code (covered above) typically also displays your current validity/expiry date alongside your balance. If you’re planning an extended trip abroad or simply want to keep a secondary number reserved, checking this figure periodically — and topping up before it lapses — is the simplest way to avoid losing a number you intend to keep.

Call Forwarding and Divert Codes

A frequently searched piece of practical “SIM info” is how to set up or cancel call forwarding:

• Activate unconditional forwarding: dial *21*[number]# then press call.
• Deactivate unconditional forwarding: dial ##21# then press call.
• Forward when busy: dial *67*[number]#.
• Forward when unanswered: dial *61*[number]#.
• Check current forwarding status: dial *#21#.

These are largely standardized GSM codes and work consistently across Jazz, Zong, Telenor, and Ufone, though it’s worth confirming forwarding hasn’t been left active unintentionally after troubleshooting a connectivity issue, since forgotten call forwarding is a common — and easily fixed — source of “missed calls I never received” complaints.

Missed Call Alert and “Sim Lagao” Reactivation Codes

If a SIM has been inactive for a period, most networks run periodic reactivation offers (“SIM Lagao” campaigns) providing free credit, minutes, or data to encourage reconnection — these are typically announced via SMS to the dormant number itself or advertised on the operator’s official app and website, since the specific offer codes rotate and aren’t fixed long-term shortcodes. If you have an old, unused SIM you want to bring back, checking your operator’s app or official social media page for the current reactivation offer is more reliable than searching for a fixed code, since these promotions change periodically.

Checking VoLTE and Wi-Fi Calling Status

Modern networks in Pakistan increasingly support VoLTE (Voice over LTE) and Wi-Fi calling, both of which typically need to be enabled from your device’s settings (usually under the SIM or cellular network menu, labeled “VoLTE” or “Wi-Fi Calling”) in addition to being supported and activated by your operator on the backend. If calls sound unusually clear or connect noticeably faster after a software update, VoLTE is very likely active; if you’re unsure, your operator’s app or helpline can confirm whether it’s enabled on your specific SIM and account tier.

Distinguishing “SIM Info” From CNIC-Linked Verification

Everything covered on this page is self-service information about the SIM you already hold — balance, data, your own number, IMEI, ICCID, network settings. None of it requires identity verification, because none of it discloses anything beyond what you already have access to on your own device. This is a meaningfully different category from the CNIC-linked verification checks covered on our Live Tracker page, which confirm which SIMs are registered against your national identity, or the broader database and legal-framework context covered on our SIM Database page. If you found this page searching for the latter, those are the two resources to use instead.

Common Issues With SIM Info Codes and How to Resolve Them

• A code returns no response. Confirm you’re dialing from the correct SIM in a dual-SIM device (many phones default to a specific SIM slot for USSD unless you select otherwise), then try the operator’s official app as a fallback.
• A code that used to work suddenly stops. Operators periodically restructure their USSD menus; the operator app almost always reflects the current, correct method even after a code changes.
• Call forwarding won’t deactivate. Try the universal deactivation code (##21#) rather than a network-specific variant, since this is a standard GSM code that generally overrides network-specific forwarding configurations.
• APN settings reset after a software update. Reinserting the SIM or restarting the device typically triggers automatic APN reconfiguration; if not, manually entering the correct APN from the table above resolves it.

Who This SIM Info Page Is For

• Anyone who just wants a quick daily-use reference for balance, data, and number checks across Pakistan’s major networks, without digging through separate operator websites.
• Users troubleshooting a connectivity issue — incorrect APN, network mode stuck on an older generation, or unexpected call forwarding — who need a single page covering the common causes.
• Anyone confused between SIM info and IMEI/device info, who wants a clear, upfront distinction rather than conflating the two.
• People reactivating a long-dormant SIM who want to understand the general “SIM Lagao” reactivation landscape before assuming a fixed code exists.

A Note on Code Accuracy Over Time

USSD codes are operator-controlled and occasionally change without wide public notice — which is why every code on this page is presented as “commonly reported” rather than guaranteed permanent. Our recommended fallback for any code on this page that doesn’t respond as expected is the relevant operator’s official app (Jazz World, My Zong, My Ufone, My Telenor), since these apps pull the same account information directly and are updated automatically alongside any backend changes, unlike a fixed USSD shortcode.

Other Practical Self-Service Checks on This Site

The same self-service philosophy behind this page — quick, practical checks you can run yourself without any formal verification process — extends to other utility services covered elsewhere on this site. If you’re also looking to check an electricity bill, our GEPCO Bill page covers the same kind of straightforward, self-service lookup for Gujranwala Electric Power Company consumers, alongside similar bill-checking guides for other regional distribution companies. It’s a different utility altogether from mobile SIM info, but the underlying idea is the same: a fast, official, no-verification-required way to check something you’re entitled to see about your own account.

Glossary: Terms Used on This Page

• USSD (Unstructured Supplementary Service Data) — the technology behind dial codes like *111# or *444#, allowing quick, session-based queries to your operator’s system without a full app or internet connection.
• IMEI — International Mobile Equipment Identity, a unique identifier for your physical device, unrelated to your SIM or subscriber account.
• ICCID — Integrated Circuit Card Identifier, the unique number printed on a physical SIM card identifying that specific card.
• APN (Access Point Name) — the network setting that tells your device how to connect to your operator’s mobile data gateway.
• VoLTE (Voice over LTE) — a technology allowing voice calls to run over a 4G data connection rather than falling back to older 2G/3G voice channels, typically resulting in clearer call quality and faster call setup.
• SIM Lagao offer — a recurring type of reactivation promotion Pakistani operators run for long-dormant SIMs, typically offering free credit, minutes, or data to encourage the subscriber to resume using the number.

Frequently Confused Terms Around “SIM Info”

• “SIM Info” vs. “SIM Information” — this page (SIM Info) focuses on quick, self-service dial codes and technical checks for the SIM you already hold; our separate SIM Information page covers the broader registration, types, and regulatory side of SIM ownership.
• “Balance check” vs. “Data/MB check” — these are two separate USSD codes on most networks; a balance check shows your rupee credit, while a data check shows your remaining internet allowance, and confusing the two codes is a common reason people think a code “isn’t working” when they’ve simply dialed the wrong one for what they wanted to check.
• “IMEI” vs. “ICCID” — the IMEI identifies your phone; the ICCID identifies your SIM card. They are entirely different numbers serving different purposes, even though both get requested during certain support interactions.

About This Page’s Editorial Process

This SIM Info guide is compiled and maintained by the SIM Owner Details editorial team, cross-referencing multiple current operator-code listings, official app documentation, and standard GSM call-forwarding codes that apply consistently across Pakistani networks. Because this page leans more technical and code-dependent than our identity-verification pages, we deliberately flag which details are stable (like the universal *#06# IMEI check, or standard GSM forwarding codes) versus which are operator-specific and subject to periodic change (like balance and data-check USSD codes) — and we point to each operator’s own app as the most reliable fallback in every case. Nothing on this page asks for your CNIC or any personal identifier; everything here is a self-service check you can already run on your own device.

A Practical Walkthrough: Checking Everything on a New Phone in One Sitting

If you’ve just switched devices — a new phone, a factory reset, or a SIM moved between devices — here’s an efficient order to run through the self-service checks on this page:

1. Dial *#06# first to confirm your device’s IMEI is displaying correctly and matches the number on the phone’s box or settings menu.
2. Check your SIM’s ICCID under Settings > About Phone > SIM Status (or equivalent), and compare it against the number printed on your physical SIM card if you still have it, to confirm the correct card is recognized.
3. Run your network’s balance check code to confirm the SIM is active and correctly registering usage on the new device.
4. Check your data/MB balance separately, since a working balance check doesn’t automatically confirm your data package transferred correctly.
5. Verify your APN settings if mobile data doesn’t connect immediately — this is the single most common new-device or post-reset issue.
6. Check your network mode under Settings > Network & Internet to confirm you’re connecting via 4G/LTE (or 5G, where supported) rather than defaulting to an older, slower mode.
7. Confirm call forwarding wasn’t carried over by dialing *#21#, particularly if the SIM was previously used in a different phone where forwarding may have been set up for a specific reason.

Running through this sequence takes only a few minutes and catches the majority of common post-switch issues before they become a recurring annoyance.

Dual-SIM Device Considerations

Most current smartphones support dual SIM operation, and this introduces a few SIM-info-specific quirks worth knowing:

• USSD codes default to a specific SIM slot unless your phone prompts you to choose, so if a balance or data check returns the wrong network’s information, check which SIM slot is set as your default for calls and data before assuming the code itself is broken.
• APN settings are typically maintained separately per SIM slot, meaning a correctly configured APN on SIM 1 doesn’t automatically apply to SIM 2 — each slot may need its own APN entry, particularly after a factory reset.
• VoLTE and network-mode settings are also usually configurable per SIM, so a device with VoLTE working on one SIM but not the other is a configuration difference between slots rather than a device-wide fault.
• Call forwarding is set per number, not per device — so forwarding configured on one SIM has no effect on the second SIM’s calls, which is worth remembering if you’re troubleshooting why forwarding “isn’t working” on a specific number.

Security Notes for Self-Service SIM Info

While everything on this page is self-service and doesn’t require identity verification, a few habits keep these checks safe:

• Never respond to an SMS or call asking you to “confirm” your balance or package details by sharing an OTP — legitimate balance and package checks never require you to send a one-time code back to anyone.
• Use official operator apps downloaded only from the Play Store or App Store, rather than third-party APKs claiming to offer “better” balance-check tools, since unofficial apps requesting SIM or account permissions carry real data-security risk.
• Be cautious with call-forwarding codes shared by someone else “to help you.” A forwarding code entered on your own phone at another person’s instruction can silently redirect your calls (including OTPs) to a number you don’t control — always verify a forwarding code’s destination number before dialing it, particularly the *21*[number]# format described earlier on this page.

Editorial Standards and Sources

This page is maintained by the SIM Owner Details editorial team and cross-checked against multiple currently available operator-code listings and official app documentation. Because USSD codes shift periodically and different sources sometimes report slightly different codes for the same function, we present the most consistently corroborated version of each code and explicitly flag the operator app as the authoritative fallback rather than presenting any single code as unconditionally permanent. If you find a code on this page that no longer works, please let us know via our Contact Us page so we can verify and update it.

SIM Info — Quick Reference Summary

• Balance check: Jazz *111#, Zong *222#, Telenor *444#, Ufone *124#.
• Data/MB check: Jazz *117#, Zong *2#, Telenor *999#, Ufone *706#.
• Check your own number: Jazz/Ufone *100#, Zong *2#, Telenor “A” via SMS to 7421.
• Device IMEI: dial *#06# on any phone (device-specific, not SIM-specific).
• ICCID: printed on the physical SIM card, or under your phone’s SIM status settings.
• Call forwarding: activate *21*[number]#, deactivate ##21#, check status *#21#.
• For CNIC-linked SIM verification (not self-service), see our Live Tracker page instead.

Bookmark this page as your quick daily reference for balance, data, and number checks — and pair it with our Live Tracker page whenever you need the identity-verification side of SIM information instead.