Will this phone work on my carrier?

It works on GSM networks such as T-Mobile, Mint Mobile, MetroPCS, Tello and most Canadian GSM carriers. It does not work on CDMA networks like Verizon, AT&T, Cricket or Straight Talk.

No. It supports only 2G and 3G, so web browsing and video will be slow and coverage depends on 3G still being available in your area.

Can I add more storage?

Yes. The 16GB built-in storage can be expanded up to 128GB with a microSD card, which helps if you store photos and music.

Is it good for apps like WhatsApp or YouTube?

Basic messaging apps run, but 1GB of RAM limits multitasking and heavier apps. Expect a slow experience with video and games.

What comes in the box?

The phone, a battery, a micro USB cable and a charger are typical. A SIM card is not included, so you need a prepaid GSM SIM.

Is $149 a good price?

It is the only new price listed, $149 at Poshmark as of November 6, 2026, so there is no recent range to compare. Similar basic 3G phones often sell for less, so check other GSM options before buying.

Where is the KostSell Basic 3G Smartphone cheapest?

At Poshmark, for $149.00, as of our latest check.

KostSell Basic 3G Smartphone

Best price now

$149.00at PoshmarkObserved at 2:16 AM

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Our take on the KostSell Basic 3G Smartphone

The KostSell Basic is a budget Android phone with a 5-inch 480 x 854 screen, 1GB of RAM, 16GB of storage and Android 9.0. It runs on 2G/3G networks only and works with GSM carriers such as T-Mobile, Mint Mobile and MetroPCS, but not with AT&T, Verizon, Cricket or other CDMA networks. Storage can be expanded to 128GB with a microSD card. Its only new price is $149 at Poshmark as of November 6, 2026, with no other new listings to compare against.