Is my Verizon samsung sch-u340 compatible with metro pcs?

The Samsung SCH-U340 is a CDMA phone, and MetroPCS primarily operates on GSM technology. Since Verizon is a CDMA network and MetroPCS uses GSM, these two technologies are not compatible. Therefore, your Verizon Samsung SCH-U340 will not work on MetroPCS. If you want to use MetroPCS, you'll need a GSM-compatible phone.