Compare mobile tariffs without paying for services you don't use
When comparing mobile tariffs, look at network, data allowance and contract term – and convert base price, connection costs and bonuses into a reliable effective price.
Before comparing, set a data range and a preferred network. In the calculator you then compare base price, one-off costs, bonuses, throttling and contract commitment.
Filters that really matter
Use your bills or your smartphone’s usage display as a starting point. Plan a moderate buffer, but don’t keep paying for many times what you need.
- Network coverage first
- Data allowance with a reserve
- Choose monthly rolling or a fixed term deliberately
- Check number porting and bonus conditions
Consider the smartphone separately
A tariff with a device is a financing package. Compare the total of one-off payment, monthly instalments and tariff costs with buying separately.
Frequently asked questions
What does throttling mean once my mobile data allowance is used up?
With throttling, the provider reduces the data rate once the agreed allowance has been used. Check the speed that then applies and any extra costs for add-on data packs. A tariff with enough data can make more sense than a small pack with frequent top-ups.
Is a larger data allowance more important than a higher maximum speed?
A large data pack helps if you regularly use up your allowance. A high maximum speed is no substitute for enough data or for good reception where you spend most of your time. Check network coverage and your past usage first.
How much data do I need per month?
More reliable than any rule of thumb is your own usage over the last three months – your smartphone's usage display or your bill will show it. Add a moderate buffer for holidays or hotspot use. If your pack is permanently far too large, you pay for it every month.
Is a tariff with a smartphone worth it?
A bundle of tariff and device is, financially speaking, a form of financing. It only becomes comparable once you add up the one-off payment, monthly device instalments and tariff costs over the whole term, and set that total against buying the device and a SIM-only tariff separately.
Can I take my phone number to a new provider?
Yes. You request number porting from the new provider, not the old one. Since the new Telecommunications Act (TKG) of 2021, porting is free of charge for you (§ 59 TKG). You can still request it up to one month after your contract has ended. The simplest option is still to request it together with the new contract.
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Your next steps
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