Sim cards are Free and very popular with mobile phone users. One of the biggest advantages is that they provide a quick and easy transition from contracts that cost the user on a monthly basis. pay as you talk sim cards are the least restrictive choice for users in payment terms, as there is no requirement at all to top up every month. We'll examine the options available:

T-Mobile Free Simcards

T-Mobile, like Vodafone, offer a single option for all call and text patterns:

t mobile Pay As You Go gives a stepped calls tariff, whereby you pay less once you've used your phone for a few of minutes that day. This is a fantastic option for users requiring more call time for less on a pay as you talk tariff.

Texting and voicemail are flat rate cost per minute/message, as is picture messaging. T Mobile also offer web access options on Pay As You Go, which is something the other networks do not so readily promote.

To get more specific information about allowances, check out T-Mobile sim cards.

Orange Free Sim Cards

Orange offer 4 diverse categories to their pay as you talk offering - Dolphin, Canary, Racoon and Camel.

Dolphin is targeted at textaholics - with extra texts available.

Canary is ideal for off peak phone calls (evenings and weekends).

Racoon is the deal for on and off peak (all day) calls.

Camel provides competitive overseas call and text rates.

For more information about the Orange prepay propostition, see orange sims.

o2 Free Sims

o2, like Orange, offer multiple options depending on your mobile usage patterns:

Favourite Place gives bonus call time from a nominated location, for example where you live.

Talkalotmore is designed for evening and weekend callers.

Text Anytime as the name suggests is ideal for texters.

o2 Unlimited at the time of press is the most popular option, with unlimited calls and texts to other o2 phones.

Your Country is the last option, specialising in phoning overseas.

To get more detailed information about allowances, visit 02 sims.

It's also worth looking at sim only contracts if you are a regular mobile user. Whilst it does still technically mean signing up for a contract, they can typically be cancelled after 30 days, and a month can cost as little as £10. In other words, if you top up by ten pounds or more a month this is probably the right option for your needs. All the big networks now offer packages of this nature, and there's plenty of help scattered across the web.

Sim cards are Free and incredibly popular with mobile phone users. One of the biggest advantages is that they provide a fast and easy route from contracts that cost the user on a monthly basis. prepay sim cards are the least restrictive option for customers in payment terms, as there is no expectation at all to pay out every 30 days. Lets look at the packages available:

Vodafone Free Sim Cards

Vodafone offer undoubtably the simplest pay as you talk deal available across the country, very aptly titled Vodafone Simply.

Vodafone Simply is quite simply (excuse the pun!) a flat price free simcard option for any mobile phone customer. The main idea is flat rate phone calls, regardless of whether you call in the day, evening, night or weekend. This is backed with flat price messaging.

As well as that, you can opt for extras, such as Voda Text Unlimited, simply by adding credit each month above a threshold. There are also overseas calls at low rates, and free weekend call options when credit is used in the week.

For more details on the Vodafone pre pay tariff, see free vodafone sims.

T-Mobile Free Sims

T-Mobile, like Vodafone, offer a single choice for all call and text patterns:

T Mobile Pay As You Talk gives a tiered calls tariff, meaning you pay less when you have used your mobile for a couple of minutes each day. This is a fantastic option for customers wanting more call time for less on a prepay deal.

Texting and voicemail are flat rate prices, as is MMS messaging. T Mobile also offer mobile internet options on Pay As You Go, which is something the other networks do not so readily advertise.

Orange Free Simcards

Orange provide 4 diverse packages to their pay as you go offering - Dolphin, Canary, Racoon and Camel.

Dolphin is targeted at textaholics - with bonus texts available.

Canary is great for off peak calls (evenings and weekends).

Racoon is the option for on and off peak (all day) calls.

Camel provides cheaper overseas call and message rates.

o2 Free Sim Cards

o2, like Orange, offer multiple choices depending on your call and text patterns:

Favourite Place gives extra call time from a specific place, for example where you live.

Talkalotmore is designed for off peak callers.

Text Anytime as the name suggests is ideal for sending sms messages.

o2 Unlimited at the time of press is the most popular option, with unlimited calls and messages to other o2 mobiles.

Your Country is the final option, perfect for calling overseas.

It's also worth looking at sim only contracts if you are a regular phone user. Although it does still technically mean signing up for a contract, they can typically be cancelled after a month, and a month can cost as little as ten pounds. In other words, if you top up by ten pounds or more a month this is likely to be the right option for you. All the big mobile networks now offer something along these lines, and there's plenty of help scattered across the internet.