what is a quadband phone

{"title":"Backup Battery GSM Wireless Desktop Phone , Wireless Quadband GSM Desk Phone","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/96\/902271df9c239357d40d576c0fc4-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"BROADSIS","Model Number":"LS980","Minimum Order Quantity":"1 units","Delivery Time":"20 days","Place of Origin":"SHENZHEN,CHINA","Payment Terms":"T\/T","Supply Ability":"3000 units\/day","Packaging Details":"Carton 420\u00d7410\u00d7280mm\uff0810pcs\/box\uff09 G.W.\uff1a13.5KG","Chipset":"MTK 6261D","Network":"GSM 850\/900\/1800\/1900MHz","Display":"2.8 inch color display","Battery":"1000mAh","Memory":"24Mb ROM+32Mb RAM","SIM Card":"Dual\/single SIM"}}

{"title":"LK109-3G3G WCDMA 900\/2100 GSM quadband, sos pet dog gps tracker","imgUrl":"https:\/\/img.chinax.com\/nimg\/b1\/89\/6d18e38d105855a71f6f6781c2b2-200x200-1.jpg","attrs":{"Price":"40- 50 $","Brand Name":"LKGPS","Model Number":"LK109-3G","Minimum Order Quantity":"10 UNIT","Delivery Time":"within 1-3 working days after the receipt of payment.","Certification":"CE,ROSH,FCC","Place of Origin":"SHENZHEN CHINA","Payment Terms":"T\/T, Western Union, Paypal","Supply Ability":"10000","Packaging Details":"1 charger, 1 USB cable, 1 screwdriver, 1 English manual, 1 gift box","Material":"plastic","Use":"Theft tracker","Color":"Black","GSM\/GPRS module":"MTK","Operation System":"Android and IOS"}}