SIM Cards in Germany: How to Choose a Carrier, Prepaid, or Contract
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It’s easy to buy a SIM card for your phone in Germany, but a good plan depends on more than just the price. It’s important to check the network coverage in your area, the contract term, cancellation terms, activation fees, eSIM availability, and identification requirements. For new arrivals, it’s usually safer to start with a prepaid plan and only sign a long-term contract after verifying coverage and all associated fees.
What mobile networks are available in Germany
Major mobile network operators in Germany include Deutsche Telekom, Vodafone, and O2 / Telefónica. In addition to these, there are virtual network operators and discount providers, such as Congstar, Aldi Talk, Lidl Connect, Blau, Otelo, and Freenet. They sell plans under their own brand names but use the infrastructure of one of the major networks.
When making your choice, it’s helpful to consider two separate issues:
| What to Choose | What It Depends On |
|---|---|
| Network: Telekom, Vodafone, O2 / Telefónica | Coverage, connection stability, speed at a specific location |
| Provider or Plan Brand | Price, Support, Contract Terms, Bonuses, eSIM, App |
| Payment type: Prepaid or Postpaid | Flexibility, risk of debt, SCHUFA check, contract term |
More expensive doesn’t always mean better for your specific location. In one neighborhood, Telekom might have better coverage, while in another, Vodafone or O2 might be better. Before signing a contract, check the carrier’s coverage map, ask your neighbors, and test the connection in the places you spend the most time: at home, at work, at university, and on the go.
Prepaid, Contract, or eSIM: A Brief Comparison
| Option | Who It’s For | Main Risks |
|---|---|---|
| Prepaid SIM Card | For tourists, new immigrants, students, and those who don’t yet know their address or have long-term plans | The plan may expire; you’ll need to top up your balance; your number may be deactivated if it remains inactive for a long time |
| Postpaid / Fixed-Term Contract | For those who plan to live in Germany long-term and have already tested the network | Contractual obligations, activation fees, complex bonuses, and smartphone installment plans |
| eSIM | For owners of compatible smartphones who want to connect without a physical SIM card | Not all plans and devices support eSIM; when switching phones, you’ll need to reactivate your profile |
Prepaid plans are usually simpler: you buy a starter pack, complete the ID verification, top up your balance, and start using the service. A contract plan may be more cost-effective if you need a large data allowance, want a family plan, or are buying a smartphone—but only if you understand the total cost over the entire contract term.
What is an eSIM?
An eSIM is a digital SIM card profile that is activated on a compatible device without a physical SIM card. You can store multiple profiles on a single smartphone, such as a German number and a number from another country. This is convenient for moving and traveling, but before purchasing, you need to check two things: whether your phone supports eSIM and whether the plan you’ve chosen offers an eSIM instead of a regular SIM.
How to Buy and Activate a Prepaid SIM
Prepaid SIM cards are sold at carrier stores, kiosks, gas stations, and at and supermarkets. Aldi, Lidl, Netto, and other chains often offer starter packs.
The process usually goes like this:
- Buy a Starterpaket with a SIM card or choose an eSIM plan online.
- Have a valid ID and proof of address in Germany ready.
- Complete the identity verification process via VideoIdent, Postident, or at the provider’s office.
- Activate the plan in the app or your account dashboard.
- Top up your balance with a voucher, direct debit, or online payment.
Identification is required: a German SIM card cannot be activated without identity verification. Different providers have varying lists of accepted documents, supported languages, and VideoIdent methods, so be sure to check these details before purchasing.
How much does mobile service cost?
Mobile service prices in Germany change rapidly due to promotions, bonuses for number porting, temporary discounts, and varying data allowances. Therefore, it’s safer to compare the total cost rather than the advertised price:
- monthly payment after the promotional period ends;
- a one-time activation fee or SIM card fee;
- data allowance and speed after the data allowance is used up;
- Plan validity period: one calendar month or 4 weeks;
- the cost of calls outside Germany and the EU;
- Terms and conditions for eSIM, MultiSIM, and number porting;
- the total amount for 24 months, if it’s a contract.
Screenshots of speed and price rankings are only useful as a rough guide. When making a purchase decision, it’s more important to check the current coverage map and the terms of the specific plan on the provider’s website.
What to Look for in a Plan
Before signing up, review the Produktinformationsblatt or Vertragszusammenfassung. These documents should clearly state the key terms in plain language: price, contract term, speed, data allowance, renewal, and the cancellation procedure.
Be sure to check the following carefully:
- Mindestvertragslaufzeit — minimum contract term.
- Anschlusspreis — connection fee.
- Grundgebühr — monthly subscription fee.
- Datenvolumen — mobile data allowance.
- Drosselung — what happens after you’ve used up your data allowance.
- Roaming — terms of use within the EU and beyond.
- Rufnummernmitnahme — number portability.
- Kündigungsfrist — the notice period and method of cancellation.
Postpaid Plans
Mobile contracts in Germany are often signed for a term of up to 24 months. The law limits the initial term of a consumer telecommunications contract to 24 months. After the minimum term expires, the automatically renewed contract can be terminated with one month’s notice.
This is an important difference from the old practice, when a contract could be extended for a long period. However, it is usually difficult to terminate a contract early before the end of the Mindestlaufzeit unless there is a specific reason, such as a material change in the terms or a persistent failure to provide the promised service.
When a contract might be a good option
A contract makes sense if you:
- you’re planning to live in Germany for a long time;
- have already checked the coverage of your chosen network;
- understand the total cost over the entire contract period;
- are willing to have payments automatically debited from their bank account;
- Do you want a large data plan, a family plan, or multiple SIM cards?
When It’s Best Not to Rush
Don’t sign a contract just because of a discount for the first few months or a free smartphone. The advertised price may include bonuses that are paid out later or only if certain conditions are met. If you fail to make payments, the debt may be transferred to a collection agency, and information about late payments can affect your credit history, including your SCHUFA score.
How to cancel a cell phone contract
The method of cancellation depends on the contract and the connection type. If the provider offers online contract signing, the website should include an option for online cancellation via a cancellation button. You can also send a written cancellation notice; to prove receipt, people often use certified mail or another method with delivery confirmation.
For automatically renewed contracts after the Mindestlaufzeit, the following rule applies: Kündigung is possible at any time with one month’s notice. For contracts that are still within the minimum term, refer to the terms in the Vertragszusammenfassung and your account dashboard.
Example of neutral wording:
Cancellation of Mobile Phone Contract [contract number]
Dear Sir or Madam, I hereby cancel my cell phone contract effective the next possible date. Please confirm receipt of this cancellation and the contract’s termination date in writing.
> Best regards
[Full Name]
Right of Withdrawal: When You Can Cancel Within 14 Days
For contracts concluded online, by phone, or outside the provider’s office, a 14-day right of withdrawal usually applies. If you purchase and sign a contract in a physical store, this automatic right generally does not apply. If you have already used the service, the provider may require payment for the days you actually used it.
Sample wording for a cancellation notice:
Cancel Mobile Phone Contract [contract number]
Dear Sir or Madam, I hereby cancel the mobile phone contract concluded on [date] within the statutory cancellation period. Please confirm this cancellation in writing.
> Best regards
[Full Name]
Bundled offers with a smartphone
Offers such as “smartphone + unlimited plan for a fixed monthly fee” should be considered an installment purchase combined with a mobile contract. Compare:
| What to Consider | Why It’s Important |
|---|---|
| All monthly payments over 24 months | Shows the actual cost, not the advertised price |
| One-time fee for the phone, shipping, and activation | Often hidden in the fine print of the offer |
| Market price of the smartphone listed separately | Helps you determine if there are real savings |
| Bonus and Cashback Terms | Bonuses may be contingent on number porting or promotional registration |
| What happens if you cancel early | You may still owe a separate fee for the device |
If the total cost is less than buying a phone and a plan separately, the offer may be a good deal. But you need to do the math based on the actual terms and conditions, not just the banner ad.
Checklist for Choosing a SIM Card in Germany
- Decide whether you need a temporary prepaid plan or a long-term contract.
- Check network coverage at your address and along your routes.
- Compare at least three plans with the same amount of data.
- Open the Vertragszusammenfassung and Produktinformationsblatt.
- Calculate the total cost, including activation fees and promotional periods.
- Check for eSIM support, roaming, number portability, and customer support in your language.
- Do not sign a contract if you do not understand the term, cancellation terms, or bonuses.
Common Mistakes
- Sign a contract only after checking coverage at your home.
- Don’t just look at the price for the first month.
- Don’t overlook the fact that the plan is valid for 4 weeks, not a calendar month.
- Ignore the activation fee.
- Get a smartphone “for free” without considering the total cost.
- Throw away the SIM card instead of canceling the contract.
For newcomers to Germany, a practical approach is as follows: start with a prepaid plan or a short-term flexible plan, and then—after testing the network and verifying your documents—switch to a contract plan if it’s actually cheaper and more convenient.
