Alyan Geek Center exists to make comparing UK monthly SIM options less confusing — by phone, in plain language, in plain language.
Alyan Geek Center is a UK-facing mobile SIM comparison and advisory service, operated by SIGE (USA) INFORMATION TECHNOLOGY CO., LTD. We help people work out which monthly data, minutes and text tier realistically matches how they use their phone — then talk through the kind of options available at that tier.
We are an independent advisory service. We are not a mobile network operator, we do not manufacture SIM cards, and we do not process payments for airtime or contracts through this website. Any agreement you enter into for a SIM or contract is made directly between you and the relevant provider.
Written comparison tables can't ask "do you mean streaming over Wi-Fi or mobile data?" A short call can. That's the entire reason this site is built around a phone number rather than an online checkout — it lets an advisor ask one or two follow-up questions before pointing you anywhere.
We explain data allowances and contract terms in everyday language first, and go into technical detail only if you ask for it.
A tier recommendation always follows a question about how you actually use your phone — never the other way round.
You're never asked to decide on the call. Take the tier we've suggested and compare it in your own time.
Alyan Geek Center (alyangeekcenter.online) is the website brand for this service and is operated by SIGE (USA) INFORMATION TECHNOLOGY CO., LTD. We do not claim to be a mobile network operator or an official support channel for any network. For details on how information is handled and the terms that apply when you contact us, see our Privacy Policy, Terms & Conditions, and Disclaimer.